-5.1% is the change from 981 to 931
Calculation steps:
[( 931 - 981 ) ÷ 981] x 100 = -5.1%
Formula
Percentage change = [(931 - 981) / 981] x 100
Subtract the new number by the original number
931 - 981 = -50
-50 ÷ 981 = -0.0509683995922528
-0.0509683995922528 x 100 = -5.1%