51.47% is the change from 136 to 206
Calculation steps:
[( 206 - 136 ) ÷ 136] x 100 = 51.47%
Formula
Percentage change = [(206 - 136) / 136] x 100
Subtract the new number by the original number
206 - 136 = 70
70 ÷ 136 = 0.5147058823529411
0.5147058823529411 x 100 = 51.47%