90% is the change from 120 to 228
Calculation steps:
[( 228 - 120 ) ÷ 120] x 100 = 90%
Formula
Percentage change = [(228 - 120) / 120] x 100
Subtract the new number by the original number
228 - 120 = 108
108 ÷ 120 = 0.9
0.9 x 100 = 90%
Example