-96.56% is the change from 902 to 31
Calculation steps:
[( 31 - 902 ) ÷ 902] x 100 = -96.56%
Formula
Percentage change = [(31 - 902) / 902] x 100
Subtract the new number by the original number
31 - 902 = -871
-871 ÷ 902 = -0.9656319290465631
-0.9656319290465631 x 100 = -96.56%