Question

A baby weighted 7.25 lb at birth at the end of 8 months the baby weighted 2 1/2 times its birth weight.how many pounds did the baby weigh at the end of 8 months

Answer 1

$7.25 = 7 \frac{1}{4} = \frac{29}{4}$
$2 \frac{1}{2} = \frac{5}{2}$

$\frac{29}{4} \times \frac{5}{2} = \frac{145}{8} = 18 \frac{1}{8} \: pounds$