Question

To allow the pump of the fish tank to work properly and avoid water overflowing, the fish tank should be filled up to 7/8 of its capacity. Emily bought a 64-gallon fish tank and filled up the fish tank with 13 gallons of salt water. How much more water should she add?

Answer 1

Answer: Emily should add 43 gallons of water to her fish tank to fill it up to 7/8 of its capacity.

Step-by-step explanation: If Emily's fish tank has a capacity of 64 gallons, she should fill it up to 7/8 of its capacity to allow the pump to work properly and avoid water overflowing.

So, the amount of water that Emily should have in her fish tank is:

64 x 7/8 = 56 gallons

Emily has already added 13 gallons of salt water. Therefore, the amount of additional water she should add to the tank is:

56 - 13 = 43 gallons

Emily should add 43 gallons of water to her fish tank to fill it up to 7/8 of its capacity.