Question

Gabby has 5 weeks to read a novel. She reads 15 pages of a novel in 3/7 week. At this rate, will gabby read the 200-page book in time?

Answer 1

15 pages - 3/7 of a week
200 pages - x weeks

Cross multiply:
$15x=200 \times \frac{3}{7} \\ 15x=\frac{600}{7} \\ x=\frac{600}{7} \times \frac{1}{15} \\ x=\frac{40}{7}\\ x=5.71...>5$

She won't read the book in time.