-32.85% is the change from 956 to 642
Calculation steps:
[( 642 - 956 ) ÷ 956] x 100 = -32.85%
Formula
Percentage change = [(642 - 956) / 956] x 100
Subtract the new number by the original number
642 - 956 = -314
-314 ÷ 956 = -0.3284518828451883
-0.3284518828451883 x 100 = -32.85%