Respuesta :
First you take the original set and subtract it by the sale set. After that you take you new answer and divide it by the original and you will get a percent that you can round too
( x = percent )
x/100 times 424.15/ 499
499x = 424.15
divide both sides by 499
x = 0.85 or 85%
x/100 times 424.15/ 499
499x = 424.15
divide both sides by 499
x = 0.85 or 85%