83.5% is the change from 503 to 923
Calculation steps:
[( 923 - 503 ) ÷ 503] x 100 = 83.5%
Formula
Percentage change = [(923 - 503) / 503] x 100
Subtract the new number by the original number
923 - 503 = 420
420 ÷ 503 = 0.8349900596421471
0.8349900596421471 x 100 = 83.5%