-94.72% is the change from 511 to 27
Calculation steps:
[( 27 - 511 ) ÷ 511] x 100 = -94.72%
Formula
Percentage change = [(27 - 511) / 511] x 100
Subtract the new number by the original number
27 - 511 = -484
-484 ÷ 511 = -0.9471624266144814
-0.9471624266144814 x 100 = -94.72%