66.42% is the change from 137 to 228
Calculation steps:
[( 228 - 137 ) ÷ 137] x 100 = 66.42%
Formula
Percentage change = [(228 - 137) / 137] x 100
Subtract the new number by the original number
228 - 137 = 91
91 ÷ 137 = 0.6642335766423357
0.6642335766423357 x 100 = 66.42%