-24.27% is the change from 511 to 387
Calculation steps:
[( 387 - 511 ) ÷ 511] x 100 = -24.27%
Formula
Percentage change = [(387 - 511) / 511] x 100
Subtract the new number by the original number
387 - 511 = -124
-124 ÷ 511 = -0.24266144814090018
-0.24266144814090018 x 100 = -24.27%