-27.93% is the change from 931 to 671
Calculation steps:
[( 671 - 931 ) ÷ 931] x 100 = -27.93%
Formula
Percentage change = [(671 - 931) / 931] x 100
Subtract the new number by the original number
671 - 931 = -260
-260 ÷ 931 = -0.27926960257787325
-0.27926960257787325 x 100 = -27.93%