-51.32% is the change from 491 to 239
Calculation steps:
[( 239 - 491 ) ÷ 491] x 100 = -51.32%
Formula
Percentage change = [(239 - 491) / 491] x 100
Subtract the new number by the original number
239 - 491 = -252
-252 ÷ 491 = -0.5132382892057027
-0.5132382892057027 x 100 = -51.32%