-31.55% is the change from 504 to 345
Calculation steps:
[( 345 - 504 ) ÷ 504] x 100 = -31.55%
Formula
Percentage change = [(345 - 504) / 504] x 100
Subtract the new number by the original number
345 - 504 = -159
-159 ÷ 504 = -0.31547619047619047
-0.31547619047619047 x 100 = -31.55%