-29.03% is the change from 31 to 22
Calculation steps:
[( 22 - 31 ) ÷ 31] x 100 = -29.03%
Formula
Percentage change = [(22 - 31) / 31] x 100
Subtract the new number by the original number
22 - 31 = -9
-9 ÷ 31 = -0.2903225806451613
-0.2903225806451613 x 100 = -29.03%