-21.6% is the change from 838 to 657
Calculation steps:
[( 657 - 838 ) ÷ 838] x 100 = -21.6%
Formula
Percentage change = [(657 - 838) / 838] x 100
Subtract the new number by the original number
657 - 838 = -181
-181 ÷ 838 = -0.2159904534606205
-0.2159904534606205 x 100 = -21.6%