43.3% is the change from 351 to 503
Calculation steps:
[( 503 - 351 ) ÷ 351] x 100 = 43.3%
Formula
Percentage change = [(503 - 351) / 351] x 100
Subtract the new number by the original number
503 - 351 = 152
152 ÷ 351 = 0.43304843304843305
0.43304843304843305 x 100 = 43.3%