-24.79% is the change from 847 to 637
Calculation steps:
[( 637 - 847 ) ÷ 847] x 100 = -24.79%
Formula
Percentage change = [(637 - 847) / 847] x 100
Subtract the new number by the original number
637 - 847 = -210
-210 ÷ 847 = -0.24793388429752067
-0.24793388429752067 x 100 = -24.79%