-31.73% is the change from 498 to 340
Calculation steps:
[( 340 - 498 ) ÷ 498] x 100 = -31.73%
Formula
Percentage change = [(340 - 498) / 498] x 100
Subtract the new number by the original number
340 - 498 = -158
-158 ÷ 498 = -0.3172690763052209
-0.3172690763052209 x 100 = -31.73%