-30.18% is the change from 497 to 347
Calculation steps:
[( 347 - 497 ) ÷ 497] x 100 = -30.18%
Formula
Percentage change = [(347 - 497) / 497] x 100
Subtract the new number by the original number
347 - 497 = -150
-150 ÷ 497 = -0.30181086519114686
-0.30181086519114686 x 100 = -30.18%