-83.04% is the change from 513 to 87
Calculation steps:
[( 87 - 513 ) ÷ 513] x 100 = -83.04%
Formula
Percentage change = [(87 - 513) / 513] x 100
Subtract the new number by the original number
87 - 513 = -426
-426 ÷ 513 = -0.8304093567251462
-0.8304093567251462 x 100 = -83.04%