517.65% is the change from 136 to 840
Calculation steps:
[( 840 - 136 ) ÷ 136] x 100 = 517.65%
Formula
Percentage change = [(840 - 136) / 136] x 100
Subtract the new number by the original number
840 - 136 = 704
704 ÷ 136 = 5.176470588235294
5.176470588235294 x 100 = 517.65%