-93.63% is the change from 487 to 31
Calculation steps:
[( 31 - 487 ) ÷ 487] x 100 = -93.63%
Formula
Percentage change = [(31 - 487) / 487] x 100
Subtract the new number by the original number
31 - 487 = -456
-456 ÷ 487 = -0.9363449691991786
-0.9363449691991786 x 100 = -93.63%