-75.1% is the change from 510 to 127
Calculation steps:
[( 127 - 510 ) ÷ 510] x 100 = -75.1%
Formula
Percentage change = [(127 - 510) / 510] x 100
Subtract the new number by the original number
127 - 510 = -383
-383 ÷ 510 = -0.7509803921568627
-0.7509803921568627 x 100 = -75.1%