-98.04% is the change from 511 to 10
Calculation steps:
[( 10 - 511 ) ÷ 511] x 100 = -98.04%
Formula
Percentage change = [(10 - 511) / 511] x 100
Subtract the new number by the original number
10 - 511 = -501
-501 ÷ 511 = -0.9804305283757339
-0.9804305283757339 x 100 = -98.04%