-31.26% is the change from 499 to 343
Calculation steps:
[( 343 - 499 ) ÷ 499] x 100 = -31.26%
Formula
Percentage change = [(343 - 499) / 499] x 100
Subtract the new number by the original number
343 - 499 = -156
-156 ÷ 499 = -0.312625250501002
-0.312625250501002 x 100 = -31.26%