209.56% is the change from 136 to 421
Calculation steps:
[( 421 - 136 ) ÷ 136] x 100 = 209.56%
Formula
Percentage change = [(421 - 136) / 136] x 100
Subtract the new number by the original number
421 - 136 = 285
285 ÷ 136 = 2.0955882352941178
2.0955882352941178 x 100 = 209.56%