-74.19% is the change from 31 to 8
Calculation steps:
[( 8 - 31 ) ÷ 31] x 100 = -74.19%
Formula
Percentage change = [(8 - 31) / 31] x 100
Subtract the new number by the original number
8 - 31 = -23
-23 ÷ 31 = -0.7419354838709677
-0.7419354838709677 x 100 = -74.19%