170% is the change from 120 to 324
Calculation steps:
[( 324 - 120 ) ÷ 120] x 100 = 170%
Formula
Percentage change = [(324 - 120) / 120] x 100
Subtract the new number by the original number
324 - 120 = 204
204 ÷ 120 = 1.7
1.7 x 100 = 170%
Example