-32.77% is the change from 952 to 640
Calculation steps:
[( 640 - 952 ) ÷ 952] x 100 = -32.77%
Formula
Percentage change = [(640 - 952) / 952] x 100
Subtract the new number by the original number
640 - 952 = -312
-312 ÷ 952 = -0.3277310924369748
-0.3277310924369748 x 100 = -32.77%