-15.52% is the change from 406 to 343
Calculation steps:
[( 343 - 406 ) ÷ 406] x 100 = -15.52%
Formula
Percentage change = [(343 - 406) / 406] x 100
Subtract the new number by the original number
343 - 406 = -63
-63 ÷ 406 = -0.15517241379310345
-0.15517241379310345 x 100 = -15.52%