-30.69% is the change from 932 to 646
Calculation steps:
[( 646 - 932 ) ÷ 932] x 100 = -30.69%
Formula
Percentage change = [(646 - 932) / 932] x 100
Subtract the new number by the original number
646 - 932 = -286
-286 ÷ 932 = -0.30686695278969955
-0.30686695278969955 x 100 = -30.69%