-55.29% is the change from 510 to 228
Calculation steps:
[( 228 - 510 ) ÷ 510] x 100 = -55.29%
Formula
Percentage change = [(228 - 510) / 510] x 100
Subtract the new number by the original number
228 - 510 = -282
-282 ÷ 510 = -0.5529411764705883
-0.5529411764705883 x 100 = -55.29%