33.8% is the change from 503 to 673
Calculation steps:
[( 673 - 503 ) ÷ 503] x 100 = 33.8%
Formula
Percentage change = [(673 - 503) / 503] x 100
Subtract the new number by the original number
673 - 503 = 170
170 ÷ 503 = 0.3379721669980119
0.3379721669980119 x 100 = 33.8%