55.64% is the change from 390 to 607
Calculation steps:
[( 607 - 390 ) ÷ 390] x 100 = 55.64%
Formula
Percentage change = [(607 - 390) / 390] x 100
Subtract the new number by the original number
607 - 390 = 217
217 ÷ 390 = 0.5564102564102564
0.5564102564102564 x 100 = 55.64%