-31.75% is the change from 504 to 344
Calculation steps:
[( 344 - 504 ) ÷ 504] x 100 = -31.75%
Formula
Percentage change = [(344 - 504) / 504] x 100
Subtract the new number by the original number
344 - 504 = -160
-160 ÷ 504 = -0.31746031746031744
-0.31746031746031744 x 100 = -31.75%