31.54% is the change from 390 to 513
Calculation steps:
[( 513 - 390 ) ÷ 390] x 100 = 31.54%
Formula
Percentage change = [(513 - 390) / 390] x 100
Subtract the new number by the original number
513 - 390 = 123
123 ÷ 390 = 0.3153846153846154
0.3153846153846154 x 100 = 31.54%