A study indicated that the citizens of Newport wasted 38,080 gallons of water last year. This year they wasted 20% less. How many gallons did the citizens wasted this year

Answer : 30,464

Method : 20% less as a multiplier is 0.8.

This is because percent is out of 100. But when converted to a decimal it is divided by 100. So a whole number is 1. But 20% less is 1 - 0.2 which equals 0.8.

Then you times the value by the multiplier to get the answer.

Therefore, it should be

38,080 x 0.8 = 30,464