-89.74% is the change from 302 to 31
Calculation steps:
[( 31 - 302 ) ÷ 302] x 100 = -89.74%
Formula
Percentage change = [(31 - 302) / 302] x 100
Subtract the new number by the original number
31 - 302 = -271
-271 ÷ 302 = -0.8973509933774835
-0.8973509933774835 x 100 = -89.74%