-77.55% is the change from 931 to 209
Calculation steps:
[( 209 - 931 ) ÷ 931] x 100 = -77.55%
Formula
Percentage change = [(209 - 931) / 931] x 100
Subtract the new number by the original number
209 - 931 = -722
-722 ÷ 931 = -0.7755102040816326
-0.7755102040816326 x 100 = -77.55%