-49.8% is the change from 498 to 250
Calculation steps:
[( 250 - 498 ) ÷ 498] x 100 = -49.8%
Formula
Percentage change = [(250 - 498) / 498] x 100
Subtract the new number by the original number
250 - 498 = -248
-248 ÷ 498 = -0.4979919678714859
-0.4979919678714859 x 100 = -49.8%