-79.84% is the change from 511 to 103
Calculation steps:
[( 103 - 511 ) ÷ 511] x 100 = -79.84%
Formula
Percentage change = [(103 - 511) / 511] x 100
Subtract the new number by the original number
103 - 511 = -408
-408 ÷ 511 = -0.7984344422700587
-0.7984344422700587 x 100 = -79.84%