-90.37% is the change from 322 to 31
Calculation steps:
[( 31 - 322 ) ÷ 322] x 100 = -90.37%
Formula
Percentage change = [(31 - 322) / 322] x 100
Subtract the new number by the original number
31 - 322 = -291
-291 ÷ 322 = -0.9037267080745341
-0.9037267080745341 x 100 = -90.37%