-55.58% is the change from 511 to 227
Calculation steps:
[( 227 - 511 ) ÷ 511] x 100 = -55.58%
Formula
Percentage change = [(227 - 511) / 511] x 100
Subtract the new number by the original number
227 - 511 = -284
-284 ÷ 511 = -0.5557729941291585
-0.5557729941291585 x 100 = -55.58%