640% is the change from 115 to 851
Calculation steps:
[( 851 - 115 ) ÷ 115] x 100 = 640%
Formula
Percentage change = [(851 - 115) / 115] x 100
Subtract the new number by the original number
851 - 115 = 736
736 ÷ 115 = 6.4
6.4 x 100 = 640%
Example