-33.08% is the change from 931 to 623
Calculation steps:
[( 623 - 931 ) ÷ 931] x 100 = -33.08%
Formula
Percentage change = [(623 - 931) / 931] x 100
Subtract the new number by the original number
623 - 931 = -308
-308 ÷ 931 = -0.3308270676691729
-0.3308270676691729 x 100 = -33.08%