-31.12% is the change from 498 to 343
Calculation steps:
[( 343 - 498 ) ÷ 498] x 100 = -31.12%
Formula
Percentage change = [(343 - 498) / 498] x 100
Subtract the new number by the original number
343 - 498 = -155
-155 ÷ 498 = -0.3112449799196787
-0.3112449799196787 x 100 = -31.12%