-20.87% is the change from 805 to 637
Calculation steps:
[( 637 - 805 ) ÷ 805] x 100 = -20.87%
Formula
Percentage change = [(637 - 805) / 805] x 100
Subtract the new number by the original number
637 - 805 = -168
-168 ÷ 805 = -0.20869565217391303
-0.20869565217391303 x 100 = -20.87%