-25.26% is the change from 851 to 636
Calculation steps:
[( 636 - 851 ) ÷ 851] x 100 = -25.26%
Formula
Percentage change = [(636 - 851) / 851] x 100
Subtract the new number by the original number
636 - 851 = -215
-215 ÷ 851 = -0.2526439482961222
-0.2526439482961222 x 100 = -25.26%