-82.24% is the change from 490 to 87
Calculation steps:
[( 87 - 490 ) ÷ 490] x 100 = -82.24%
Formula
Percentage change = [(87 - 490) / 490] x 100
Subtract the new number by the original number
87 - 490 = -403
-403 ÷ 490 = -0.8224489795918367
-0.8224489795918367 x 100 = -82.24%