Question

an aquarium holds 6 1/4 gallons of water. the water level has dropped to 4/5 of this amount. how much water should be filled?

Answer 1

1 1/4 gallons need to be added.

If the water level has dropped to 4/5 of the 6 1/4 gallons that it can hold, then that means that 1/5 of the aquariums capacity is gone. So you have to multiply 6 1/4 X 1/5.
Change 6 1/4 to an improper fraction, 25/4. Then multiply that by 1/5.
25/4 X 1/5 = 25/20, which is 1 5/20, which can be reduced to 1 1/4 gallons.

Answer 2

1) convert the mixed number into an improper fraction
http://www.ehow.com/how_4546598_convert-mixed-numbers-improper-fractions.html

2) multiply 4/5 to the improper fraction

Answer 3

thank you soooooooo much! this really helped me allot! ( had an answer on my paper didn't know it so I looked it up) he he (:c) <-- monkey

Answer 4

Don't waste your life with this math and do something else

Answer 5

How do you get 1/5?

Answer 6

1 1/4 gallons need to be added.

If the water level has dropped to 4/5 of the 6 1/4 gallons that it can hold, then that means that 1/5 of the capacity of the aquarium is gone. So you have to multiply 6 1/4 X 1/5.
Change 6 1/4 to an improper fraction, 25/4. Then multiply that by 1/5.
25/4 X 1/5 = 25/20, which is 1 5/20, which can be reduced to 1 1/4 gallons.