-25.15% is the change from 851 to 637
Calculation steps:
[( 637 - 851 ) ÷ 851] x 100 = -25.15%
Formula
Percentage change = [(637 - 851) / 851] x 100
Subtract the new number by the original number
637 - 851 = -214
-214 ÷ 851 = -0.25146886016451236
-0.25146886016451236 x 100 = -25.15%