-37.5% is the change from 496 to 310
Calculation steps:
[( 310 - 496 ) ÷ 496] x 100 = -37.5%
Formula
Percentage change = [(310 - 496) / 496] x 100
Subtract the new number by the original number
310 - 496 = -186
-186 ÷ 496 = -0.375
-0.375 x 100 = -37.5%