44.13% is the change from 349 to 503
Calculation steps:
[( 503 - 349 ) ÷ 349] x 100 = 44.13%
Formula
Percentage change = [(503 - 349) / 349] x 100
Subtract the new number by the original number
503 - 349 = 154
154 ÷ 349 = 0.44126074498567336
0.44126074498567336 x 100 = 44.13%