-48.98% is the change from 488 to 249
Calculation steps:
[( 249 - 488 ) ÷ 488] x 100 = -48.98%
Formula
Percentage change = [(249 - 488) / 488] x 100
Subtract the new number by the original number
249 - 488 = -239
-239 ÷ 488 = -0.48975409836065575
-0.48975409836065575 x 100 = -48.98%