-25.38% is the change from 851 to 635
Calculation steps:
[( 635 - 851 ) ÷ 851] x 100 = -25.38%
Formula
Percentage change = [(635 - 851) / 851] x 100
Subtract the new number by the original number
635 - 851 = -216
-216 ÷ 851 = -0.25381903642773207
-0.25381903642773207 x 100 = -25.38%