-31.01% is the change from 932 to 643
Calculation steps:
[( 643 - 932 ) ÷ 932] x 100 = -31.01%
Formula
Percentage change = [(643 - 932) / 932] x 100
Subtract the new number by the original number
643 - 932 = -289
-289 ÷ 932 = -0.31008583690987124
-0.31008583690987124 x 100 = -31.01%