900% is the change from 12 to 120
Calculation steps:
[( 120 - 12 ) ÷ 12] x 100 = 900%
Formula
Percentage change = [(120 - 12) / 12] x 100
Subtract the new number by the original number
120 - 12 = 108
108 ÷ 12 = 9
9 x 100 = 900%
Example