-15.76% is the change from 406 to 342
Calculation steps:
[( 342 - 406 ) ÷ 406] x 100 = -15.76%
Formula
Percentage change = [(342 - 406) / 406] x 100
Subtract the new number by the original number
342 - 406 = -64
-64 ÷ 406 = -0.15763546798029557
-0.15763546798029557 x 100 = -15.76%