Question

An Olympic-sized pool, which holds 660,000 gallons of water,

is only 63% full. The pool maintenance company adds more
water, filling the pool to 90% full. How many gallons of water
did they add?
P
7.AR 3.1
a
244 200
178 200
B) 594 000
415.800
134

Answer 1

178,200

Explanation:

You want to know the number of gallons added to a 660,000 gallon pool to raise it from 63% full to 90% full.

Increase

The increase from 63% to 90% is an increase of ...

0.90 -0.63 = 0.27

of the capacity of the pool. That fraction of the capacity is ...

0.27 × 660,000 gallons = 178,200 gallons

The maintenance company added 178,200 gallons.