68.89% is the change from 135 to 228
Calculation steps:
[( 228 - 135 ) ÷ 135] x 100 = 68.89%
Formula
Percentage change = [(228 - 135) / 135] x 100
Subtract the new number by the original number
228 - 135 = 93
93 ÷ 135 = 0.6888888888888889
0.6888888888888889 x 100 = 68.89%