-79.88% is the change from 512 to 103
Calculation steps:
[( 103 - 512 ) ÷ 512] x 100 = -79.88%
Formula
Percentage change = [(103 - 512) / 512] x 100
Subtract the new number by the original number
103 - 512 = -409
-409 ÷ 512 = -0.798828125
-0.798828125 x 100 = -79.88%