58.09% is the change from 136 to 215
Calculation steps:
[( 215 - 136 ) ÷ 136] x 100 = 58.09%
Formula
Percentage change = [(215 - 136) / 136] x 100
Subtract the new number by the original number
215 - 136 = 79
79 ÷ 136 = 0.5808823529411765
0.5808823529411765 x 100 = 58.09%