-55.49% is the change from 510 to 227
Calculation steps:
[( 227 - 510 ) ÷ 510] x 100 = -55.49%
Formula
Percentage change = [(227 - 510) / 510] x 100
Subtract the new number by the original number
227 - 510 = -283
-283 ÷ 510 = -0.5549019607843138
-0.5549019607843138 x 100 = -55.49%