-97.47% is the change from 513 to 13
Calculation steps:
[( 13 - 513 ) ÷ 513] x 100 = -97.47%
Formula
Percentage change = [(13 - 513) / 513] x 100
Subtract the new number by the original number
13 - 513 = -500
-500 ÷ 513 = -0.9746588693957114
-0.9746588693957114 x 100 = -97.47%