-49.4% is the change from 496 to 251
Calculation steps:
[( 251 - 496 ) ÷ 496] x 100 = -49.4%
Formula
Percentage change = [(251 - 496) / 496] x 100
Subtract the new number by the original number
251 - 496 = -245
-245 ÷ 496 = -0.4939516129032258
-0.4939516129032258 x 100 = -49.4%