Question

A number is increased by 25% and the resulting number is then decreased by 20%. the final number is what percent of the original number?
-I used 100 as my original number, and when i increased it by 25% i got 125. when i proceeded to decrease that by 20% i got 105. that would put the final number being over 100% of the original number

Answer 1

You can't decrease 125 by 20... that isn't 20%

Answer 2

Number n,

n*1.25 is increasing it by 25%

(n*1.25)*0.8 is decreasing it by 20%. simplify that.

Answer 3

how did you get 0.8

Answer 4

Decreasing something by x% is the same as finding (100-x)% of it... convert that to a decimal.

Decrease by 30%? multiply it by 0.7

Decrease by 90%? multiply by 0.1

Answer 5

ok
thanks