-75.15% is the change from 511 to 127
Calculation steps:
[( 127 - 511 ) ÷ 511] x 100 = -75.15%
Formula
Percentage change = [(127 - 511) / 511] x 100
Subtract the new number by the original number
127 - 511 = -384
-384 ÷ 511 = -0.7514677103718199
-0.7514677103718199 x 100 = -75.15%