-17.99% is the change from 417 to 342
Calculation steps:
[( 342 - 417 ) ÷ 417] x 100 = -17.99%
Formula
Percentage change = [(342 - 417) / 417] x 100
Subtract the new number by the original number
342 - 417 = -75
-75 ÷ 417 = -0.17985611510791366
-0.17985611510791366 x 100 = -17.99%