-69.92% is the change from 931 to 280
Calculation steps:
[( 280 - 931 ) ÷ 931] x 100 = -69.92%
Formula
Percentage change = [(280 - 931) / 931] x 100
Subtract the new number by the original number
280 - 931 = -651
-651 ÷ 931 = -0.6992481203007519
-0.6992481203007519 x 100 = -69.92%