-99.22% is the change from 511 to 4
Calculation steps:
[( 4 - 511 ) ÷ 511] x 100 = -99.22%
Formula
Percentage change = [(4 - 511) / 511] x 100
Subtract the new number by the original number
4 - 511 = -507
-507 ÷ 511 = -0.9921722113502935
-0.9921722113502935 x 100 = -99.22%