-75.69% is the change from 510 to 124
Calculation steps:
[( 124 - 510 ) ÷ 510] x 100 = -75.69%
Formula
Percentage change = [(124 - 510) / 510] x 100
Subtract the new number by the original number
124 - 510 = -386
-386 ÷ 510 = -0.7568627450980392
-0.7568627450980392 x 100 = -75.69%