30.75% is the change from 387 to 506
Calculation steps:
[( 506 - 387 ) ÷ 387] x 100 = 30.75%
Formula
Percentage change = [(506 - 387) / 387] x 100
Subtract the new number by the original number
506 - 387 = 119
119 ÷ 387 = 0.30749354005167956
0.30749354005167956 x 100 = 30.75%