31.78% is the change from 387 to 510
Calculation steps:
[( 510 - 387 ) ÷ 387] x 100 = 31.78%
Formula
Percentage change = [(510 - 387) / 387] x 100
Subtract the new number by the original number
510 - 387 = 123
123 ÷ 387 = 0.3178294573643411
0.3178294573643411 x 100 = 31.78%