49.26% is the change from 337 to 503
Calculation steps:
[( 503 - 337 ) ÷ 337] x 100 = 49.26%
Formula
Percentage change = [(503 - 337) / 337] x 100
Subtract the new number by the original number
503 - 337 = 166
166 ÷ 337 = 0.49258160237388726
0.49258160237388726 x 100 = 49.26%