-30.58% is the change from 497 to 345
Calculation steps:
[( 345 - 497 ) ÷ 497] x 100 = -30.58%
Formula
Percentage change = [(345 - 497) / 497] x 100
Subtract the new number by the original number
345 - 497 = -152
-152 ÷ 497 = -0.3058350100603622
-0.3058350100603622 x 100 = -30.58%