-23.99% is the change from 838 to 637
Calculation steps:
[( 637 - 838 ) ÷ 838] x 100 = -23.99%
Formula
Percentage change = [(637 - 838) / 838] x 100
Subtract the new number by the original number
637 - 838 = -201
-201 ÷ 838 = -0.2398568019093079
-0.2398568019093079 x 100 = -23.99%