-53.14% is the change from 510 to 239
Calculation steps:
[( 239 - 510 ) ÷ 510] x 100 = -53.14%
Formula
Percentage change = [(239 - 510) / 510] x 100
Subtract the new number by the original number
239 - 510 = -271
-271 ÷ 510 = -0.5313725490196078
-0.5313725490196078 x 100 = -53.14%