-38.49% is the change from 504 to 310
Calculation steps:
[( 310 - 504 ) ÷ 504] x 100 = -38.49%
Formula
Percentage change = [(310 - 504) / 504] x 100
Subtract the new number by the original number
310 - 504 = -194
-194 ÷ 504 = -0.38492063492063494
-0.38492063492063494 x 100 = -38.49%