63. First, find LCM of the denominators. Express the fractions using the obtained LCM as their denominators. Then consider the numerators. The larger numerator, the larger fraction. It inversely hold.
65. First, find LCM of the numerators. Express the fractions using the obtained LCM as their numerators. Then consider the denominators. Then, the smaller the denominator is the larger fraction. It inversely hold.