1. Name ____________________________________ Date __________________
Mrs. Labuski / Mrs. Portsmore Period __________ Unit 7 Lesson 1 Ratios
TB 8-1; OC 5-1
VOCABULARY DEFINITION EXAMPLE
RATIO See below
EQUIVALENT RATIOS
Let’s compare the number of boys in the class to the number of girls in the class and
write it as a ratio. First find each quantity.
Number Number
of boys of girls
Then write the comparison as a ratio, using the quantities in the same order as
they appear in the word expression.There are three ways to write a ratio.
Written as a fraction Written with a colon Written with words
Now you try:
Ratio Written as a Written with Written with
fraction a colon words
1. lions to
elephants
2. giraffes to
otters
3. lions to
seals
4. seals to
elephants
5. elephants
to lions

2. equivalent ratio
equivalent ratio
Ratio (x by fractional
(÷ by fractional
Write a ratio and an equivalent ratio. written as a
equivalent of one)
equivalent of one)
fraction (equal to ratio in
(reduce)
first column)
Mrs. Labuski has tried to start cooking healthier for her family.
Instead of using white flour to make her famous Sunday Morning
Pancake, Mrs. Labuski is going to replace some of the white flour
with some whole wheat flour. Right now the recipe calls for 3
cups of white flour. Mrs. Labuski is going to use 2 cups of whole
wheat flour and one cup of white flour. What is the ratio of whole
wheat flour to white flour?
____________________________________________________

3. Do you think the pancakes will taste more like whole wheat pancakes or regular
pancakes? Defend your position.
___________________________________________________________________
___________________________________________________________________
___________________________________________________________________
The regular recipe makes 20 pancakes. Since I go to the gym so early
in the morning, I have decided to double the recipe so that I have
leftovers for the week for my kids to eat for breakfast before school.
To double the recipe, you need _________cups of whole wheat flour
and _________cups of white flour. This makes a total of _________pancakes.
What is the ratio of whole wheat flour to white flour if I double the recipe?_______
To triple the recipe, you need _________cups of whole wheat flour and
_________cups of white flour. This makes a total of _________pancakes
What is the ratio of whole wheat flour to white flour if I triple the recipe?________
Mrs. Labuski volunteered to make pancakes for the PTA fundraiser breakfast. How
many cups of each flour will she need to make 100 pancakes?
whole wheat flour _________________ white flour ____________________
What is the ratio of whole wheat flour to white flour for 100 pancakes? _________
Complete the chart of equivalent ratios:
single batch double batch triple batch PTA breakfast
(20 pancakes) (40 pancakes) (60 pancakes) (100 pancakes)
Why can you multiply or divide both terms of a ratio by the same number without
changing the value of the ratio?
___________________________________________________________________
___________________________________________________________________
___________________________________________________________________

4. Name ____________________________________ Date __________________
Mrs. Labuski / Mrs. Portsmore Period __________ Unit 7 Lesson 1 Ratios
TB 8-1; OC 5-1
VOCABULARY DEFINITION EXAMPLE
A comparison of two quantities by division.
RATIO See below
Can be written three ways.
Ratios that name the same comparison. Find
EQUIVALENT
equivalent ratios by multiplying or dividing
RATIOS
both terms of a ratio by the same number.
Let’s compare the number of boys in the class to the number of girls in the class and
write it as a ratio. First find each quantity.
Number Number
of boys of girls
11 9
Then write the comparison as a ratio, using the quantities in the same order as
they appear in the word expression.There are three ways to write a ratio.
Written as a fraction Written with a colon Written with words
11
11:9 11 to 9
9
Now you try:
Ratio Written as a Written with Written with
fraction a colon words
1. lions to 93 9:12 9 to 12
elephants 12 4 3:4 3 to 4
2. giraffes to 81 8:16 8 to 16
otters 16 2 1:2 1 to 2
3. lions to 9
9:10 9 to 10
seals 10
4. seals to 105 10:12 10 to 12
elephants 12 6 5:6 5 to 6
5. elephants 124 12:9 12 to 9
to lions 9 3 4:3 4 to 3

5. equivalent ratio
equivalent ratio
Ratio (x by fractional
(÷ by fractional
Write a ratio and an equivalent ratio. written as a
equivalent of one)
equivalent of one)
fraction (equal to ratio in
(reduce)
first column)
16 2 9
56 7 21
54 6 24
9 1 4
6 1 5
42 7 35
21 3 6
35 5 10
Mrs. Labuski has tried to start cooking healthier for her family.
Instead of using white flour to make her famous Sunday Morning
Pancake, Mrs. Labuski is going to replace some of the white flour
with some whole wheat flour. Right now the recipe calls for 3
cups of white flour. Mrs. Labuski is going to use 2 cups of whole
wheat flour and one cup of white flour. What is the ratio of whole
wheat flour to white flour?
___ _____________________________________________

6. Do you think the pancakes will taste more like whole wheat pancakes or regular
pancakes? Defend your position.
The pancakes will taste more like whole wheat flour because there is more whole
wheat flour than white flour used in the pancakes.
The regular recipe makes 20 pancakes. Since I go to the gym so early
in the morning, I have decided to double the recipe so that I have
leftovers for the week for my kids to eat for breakfast before school.
To double the recipe, you need __4_______cups of whole wheat flour
and ___2______cups of white flour. This makes a total of ___40______pancakes.
What is the ratio of whole wheat flour to white flour if I double the recipe?_
To triple the recipe, you need __6_______cups of whole wheat flour and
__3_______cups of white flour. This makes a total of ___60______pancakes
What is the ratio of whole wheat flour to white flour if I triple the recipe?__
Mrs. Labuski volunteered to make pancakes for the PTA fundraiser breakfast. How
many cups of each flour will she need to make 100 pancakes?
whole wheat flour ____10_____________ white flour _____5_______________
What is the ratio of whole wheat flour to white flour for 100 pancakes?
Complete the chart of equivalent ratios:
single batch double batch triple batch PTA breakfast
(20 pancakes) (40 pancakes) (60 pancakes) (100 pancakes)
Why can you multiply or divide both terms of a ratio by the same number without
changing the value of the ratio? Multiplying/dividing the numerator & denominator
by the same number (fractional equivalent of one) is equivalent to
multiplying/dividing by 1 (identity property of one)