-55.38% is the change from 511 to 228
Calculation steps:
[( 228 - 511 ) ÷ 511] x 100 = -55.38%
Formula
Percentage change = [(228 - 511) / 511] x 100
Subtract the new number by the original number
228 - 511 = -283
-283 ÷ 511 = -0.5538160469667319
-0.5538160469667319 x 100 = -55.38%