82.74% is the change from 504 to 921
Calculation steps:
[( 921 - 504 ) ÷ 504] x 100 = 82.74%
Formula
Percentage change = [(921 - 504) / 504] x 100
Subtract the new number by the original number
921 - 504 = 417
417 ÷ 504 = 0.8273809523809523
0.8273809523809523 x 100 = 82.74%