Question

When a number is decreased by 17% the result is 15 what is the original number to the nearest tenth

Answer 1

18.1

i did the same quiz yesterday and i still have my notes.

Explanation:

Answer 2

The original number was 18.1.

Explanation:

This question can be solved using a simple rule of three.

When a number is decreased by 17% the result is 15.

So 15 is 100-17 = 83%. The original number is 100%. Then

15 - 0.83

x - 1

`0.83x = 15`

`x = (15)/(0.83)`

`x = 18.1`

The original number was 18.1.