-7.31% is the change from 424 to 393
Calculation steps:
[( 393 - 424 ) ÷ 424] x 100 = -7.31%
Formula
Percentage change = [(393 - 424) / 424] x 100
Subtract the new number by the original number
393 - 424 = -31
-31 ÷ 424 = -0.07311320754716981
-0.07311320754716981 x 100 = -7.31%