percent

1. Nitrogen makes up 78 percent of the
air. Oxygen, the gas that is most
important for keeping you alive, makes
up 21 percent.
More than 70 percent of Earth’s crust
is covered with water.

5. • To write a PERCENT as a DECIMAL.
• Change the percent to fraction with a
denominator of 100. then, divide the
NUMERATOR by the DENOMINATOR.

6. • Another way to write a percent as decimal is
to move the decimal point two (2) places to
the LEFT and drop the PERCENT (%) SIGN

7. • To write a fraction as percent, obtain an
equivalent fraction whose denominator
is 100. take the NUMERATOR and affix
the percent sign.

8. • The common method to change a
fraction to percent is to multiply the
fraction by 100%

9. • Another way to write fraction as a
percent is to convert the fraction to
a decimal to a percent.

10. • The method is also used when
converting mixed numbers to
percents.

11. • A short way to write decimal to percent is to
the decimal point two (2) places to the
right and affix the % sign.

12. FINDING THE PERCENTAGE

13. Convert 5% to
decimal then
Multiply

14. FINDING THE BASE

15. Convert 15%
to decimal
then Divide

16. FINDING THE RATE

17. 12 is what percent of 40?
CONVERT 0.30
TO PERCENT
= 30%

18. • Percentages are an important part of our
everyday lives.
• Percentage is a very handy way of
writing fractions.
• Percentages can be compared more
easily than fractions.