He number 80 is decreased to 73. What is the percentage by which the number was decreased, to the nearest tenth of a percent?

8.8% decrease to the nearest tenth

Step-by-step explanation: For this problem we will be finding the percent decrease, so we could write a "percent decrease" equation.

change = percent change x original amount

To find the change subtract, 80-73, which equals 7

7 = percent change x original amount

The original amount is 80 because it is the number before being decreased.

7 = percent change x 80

Solve for p, percent change.

7 = p x 80

7/80 = p

0.0875 = p

To find the percent change multiply 0.0875 by 100 to get a percent.

0.0875 x 100 = 8.75% percent decrease.

8.75% to the nearest tenth is 8.8%.