29.72% is the change from 387 to 502
Calculation steps:
[( 502 - 387 ) ÷ 387] x 100 = 29.72%
Formula
Percentage change = [(502 - 387) / 387] x 100
Subtract the new number by the original number
502 - 387 = 115
115 ÷ 387 = 0.2971576227390181
0.2971576227390181 x 100 = 29.72%