-2.21% is the change from 952 to 931
Calculation steps:
[( 931 - 952 ) ÷ 952] x 100 = -2.21%
Formula
Percentage change = [(931 - 952) / 952] x 100
Subtract the new number by the original number
931 - 952 = -21
-21 ÷ 952 = -0.022058823529411766
-0.022058823529411766 x 100 = -2.21%