37.38% is the change from 503 to 691
Calculation steps:
[( 691 - 503 ) ÷ 503] x 100 = 37.38%
Formula
Percentage change = [(691 - 503) / 503] x 100
Subtract the new number by the original number
691 - 503 = 188
188 ÷ 503 = 0.37375745526838966
0.37375745526838966 x 100 = 37.38%