How do I find percent increase and decrease?

Answer:
%=New amount-original amount/original amount.
ex: New amount=200 original amount=120
200-120=80
80/120=0.666666666
then you need to multiply your answer by 100
0.666666666*100=
66.6666666666 = 66 2/3 %
First answer by AmazingMath. Last edit by AmazingMath. Contributor trust: 134 [recommend contributor recommended]. Question popularity: 12 [recommend question].