208.82% is the change from 136 to 420
Calculation steps:
[( 420 - 136 ) ÷ 136] x 100 = 208.82%
Formula
Percentage change = [(420 - 136) / 136] x 100
Subtract the new number by the original number
420 - 136 = 284
284 ÷ 136 = 2.088235294117647
2.088235294117647 x 100 = 208.82%