-31.45% is the change from 496 to 340
Calculation steps:
[( 340 - 496 ) ÷ 496] x 100 = -31.45%
Formula
Percentage change = [(340 - 496) / 496] x 100
Subtract the new number by the original number
340 - 496 = -156
-156 ÷ 496 = -0.31451612903225806
-0.31451612903225806 x 100 = -31.45%