-50.92% is the change from 487 to 239
Calculation steps:
[( 239 - 487 ) ÷ 487] x 100 = -50.92%
Formula
Percentage change = [(239 - 487) / 487] x 100
Subtract the new number by the original number
239 - 487 = -248
-248 ÷ 487 = -0.5092402464065708
-0.5092402464065708 x 100 = -50.92%