-82.28% is the change from 491 to 87
Calculation steps:
[( 87 - 491 ) ÷ 491] x 100 = -82.28%
Formula
Percentage change = [(87 - 491) / 491] x 100
Subtract the new number by the original number
87 - 491 = -404
-404 ÷ 491 = -0.8228105906313645
-0.8228105906313645 x 100 = -82.28%