54.62% is the change from 390 to 603
Calculation steps:
[( 603 - 390 ) ÷ 390] x 100 = 54.62%
Formula
Percentage change = [(603 - 390) / 390] x 100
Subtract the new number by the original number
603 - 390 = 213
213 ÷ 390 = 0.5461538461538461
0.5461538461538461 x 100 = 54.62%