340% is the change from 120 to 528
Calculation steps:
[( 528 - 120 ) ÷ 120] x 100 = 340%
Formula
Percentage change = [(528 - 120) / 120] x 100
Subtract the new number by the original number
528 - 120 = 408
408 ÷ 120 = 3.4
3.4 x 100 = 340%
Example