A20 gallon fish tank is being filled at a rate of 2 gallons per minute. at this rate, how many minutes will it take to fill this fish tank 3/4 full?

Since 3/4 of 20 is 15, 15 is 3/4 of tank.

Then since the tanked is being filled at a unit rate of 2 I would do 2 * 7.5 which is 15 :D Yay!

Then I would do 1 * 7.5 which is 7.5

So, the tanked would be filled at 3/4 in 7.5 minutes or 7 1/2 a minute.