-90.25% is the change from 513 to 50
Calculation steps:
[( 50 - 513 ) ÷ 513] x 100 = -90.25%
Formula
Percentage change = [(50 - 513) / 513] x 100
Subtract the new number by the original number
50 - 513 = -463
-463 ÷ 513 = -0.9025341130604289
-0.9025341130604289 x 100 = -90.25%