46.15% is the change from 390 to 570
Calculation steps:
[( 570 - 390 ) ÷ 390] x 100 = 46.15%
Formula
Percentage change = [(570 - 390) / 390] x 100
Subtract the new number by the original number
570 - 390 = 180
180 ÷ 390 = 0.46153846153846156
0.46153846153846156 x 100 = 46.15%