-32.71% is the change from 957 to 644
Calculation steps:
[( 644 - 957 ) ÷ 957] x 100 = -32.71%
Formula
Percentage change = [(644 - 957) / 957] x 100
Subtract the new number by the original number
644 - 957 = -313
-313 ÷ 957 = -0.3270637408568443
-0.3270637408568443 x 100 = -32.71%