-29.81% is the change from 936 to 657
Calculation steps:
[( 657 - 936 ) ÷ 936] x 100 = -29.81%
Formula
Percentage change = [(657 - 936) / 936] x 100
Subtract the new number by the original number
657 - 936 = -279
-279 ÷ 936 = -0.2980769230769231
-0.2980769230769231 x 100 = -29.81%