Question

the water level of a pond drops an inch every 7 days without rain how many days will it take the ponds water level to drop by 12 inches

Answer 1

1/7 = 12/x.....1 inch to 7 days = 12 inches to x days
cross multiply
(1)(x) = (7)(12)
x = 84 days <===

Answer 2

1 inch in 7 days

multiply 7 by 12

7 *12 = 84 days