-42.96% is the change from 931 to 531
Calculation steps:
[( 531 - 931 ) ÷ 931] x 100 = -42.96%
Formula
Percentage change = [(531 - 931) / 931] x 100
Subtract the new number by the original number
531 - 931 = -400
-400 ÷ 931 = -0.4296455424274973
-0.4296455424274973 x 100 = -42.96%