Percent Formulas

Question 1

Regular

Answer 1

part over total = percent over 100 or is over of = percent over 100
whole x % = part

Question 2

percent change

Answer 2

amount change over og. amount
or = % over 100

Question 3

percent error

Answer 3

difference over actual value *always positive

Question 4

simple interest

Answer 4

I=PRT
I=interest
P=principle (Og amount)
R=rate (%)
T=time (years)