Question

20 is how much less than 30? What percent less?

Answer 1

33.3333% decrease

Explanation:

Percent change formula:
`((x-y))/(|y|) *100`, where x is the new value and y is the starting value.

Plug in values and solve:

`(20-30)/(30) *100\\(-10)/(30) *100\\-0.3333*100\\`

-33.3333% change, or a 33.3333% decrease.