-30.8% is the change from 500 to 346
Calculation steps:
[( 346 - 500 ) ÷ 500] x 100 = -30.8%
Formula
Percentage change = [(346 - 500) / 500] x 100
Subtract the new number by the original number
346 - 500 = -154
-154 ÷ 500 = -0.308
-0.308 x 100 = -30.8%