-83.11% is the change from 515 to 87
Calculation steps:
[( 87 - 515 ) ÷ 515] x 100 = -83.11%
Formula
Percentage change = [(87 - 515) / 515] x 100
Subtract the new number by the original number
87 - 515 = -428
-428 ÷ 515 = -0.8310679611650486
-0.8310679611650486 x 100 = -83.11%