67.65% is the change from 136 to 228
Calculation steps:
[( 228 - 136 ) ÷ 136] x 100 = 67.65%
Formula
Percentage change = [(228 - 136) / 136] x 100
Subtract the new number by the original number
228 - 136 = 92
92 ÷ 136 = 0.6764705882352942
0.6764705882352942 x 100 = 67.65%