-24.11% is the change from 838 to 636
Calculation steps:
[( 636 - 838 ) ÷ 838] x 100 = -24.11%
Formula
Percentage change = [(636 - 838) / 838] x 100
Subtract the new number by the original number
636 - 838 = -202
-202 ÷ 838 = -0.24105011933174225
-0.24105011933174225 x 100 = -24.11%