-33.44% is the change from 957 to 637
Calculation steps:
[( 637 - 957 ) ÷ 957] x 100 = -33.44%
Formula
Percentage change = [(637 - 957) / 957] x 100
Subtract the new number by the original number
637 - 957 = -320
-320 ÷ 957 = -0.3343782654127482
-0.3343782654127482 x 100 = -33.44%