-80.51% is the change from 513 to 100
Calculation steps:
[( 100 - 513 ) ÷ 513] x 100 = -80.51%
Formula
Percentage change = [(100 - 513) / 513] x 100
Subtract the new number by the original number
100 - 513 = -413
-413 ÷ 513 = -0.8050682261208577
-0.8050682261208577 x 100 = -80.51%