-18.18% is the change from 418 to 342
Calculation steps:
[( 342 - 418 ) ÷ 418] x 100 = -18.18%
Formula
Percentage change = [(342 - 418) / 418] x 100
Subtract the new number by the original number
342 - 418 = -76
-76 ÷ 418 = -0.18181818181818182
-0.18181818181818182 x 100 = -18.18%
Example