29.31% is the change from 389 to 503
Calculation steps:
[( 503 - 389 ) ÷ 389] x 100 = 29.31%
Formula
Percentage change = [(503 - 389) / 389] x 100
Subtract the new number by the original number
503 - 389 = 114
114 ÷ 389 = 0.2930591259640103
0.2930591259640103 x 100 = 29.31%