-75.73% is the change from 511 to 124
Calculation steps:
[( 124 - 511 ) ÷ 511] x 100 = -75.73%
Formula
Percentage change = [(124 - 511) / 511] x 100
Subtract the new number by the original number
124 - 511 = -387
-387 ÷ 511 = -0.7573385518590998
-0.7573385518590998 x 100 = -75.73%