54.87% is the change from 390 to 604
Calculation steps:
[( 604 - 390 ) ÷ 390] x 100 = 54.87%
Formula
Percentage change = [(604 - 390) / 390] x 100
Subtract the new number by the original number
604 - 390 = 214
214 ÷ 390 = 0.5487179487179488
0.5487179487179488 x 100 = 54.87%