-21.48% is the change from 931 to 731
Calculation steps:
[( 731 - 931 ) ÷ 931] x 100 = -21.48%
Formula
Percentage change = [(731 - 931) / 931] x 100
Subtract the new number by the original number
731 - 931 = -200
-200 ÷ 931 = -0.21482277121374865
-0.21482277121374865 x 100 = -21.48%