-96.62% is the change from 917 to 31
Calculation steps:
[( 31 - 917 ) ÷ 917] x 100 = -96.62%
Formula
Percentage change = [(31 - 917) / 917] x 100
Subtract the new number by the original number
31 - 917 = -886
-886 ÷ 917 = -0.9661941112322792
-0.9661941112322792 x 100 = -96.62%