identify the percent of change as an increase or a decrease. Then find the percent of change.

Question 1 84 increased by 12%

Question 2 820 decreased by 25%

Nerd123
Jan 30, 2018

#1**+2 **

Well....by the use of the word "increase" or "decrease" in the questions themselves, we should be able to answer the first part

Here's 1

Note something important we can write an "x" percent increase as

(1 + the decimal representation of the percent increase )

So......this becomes

84 ( 1 + 12%) = 84 ( 1 + .12) = 84 ( 1.12) = 94.08

Here's 2

Likewise.....we can write an "x" percent decrease as

(1 - the decimal representation of that decrease )

So we have

820 ( 1 - 25% ) = 820 ( 1 - .25) = 820 (.75) = 615

CPhill
Jan 30, 2018