29.59% is the change from 392 to 508
Calculation steps:
[( 508 - 392 ) ÷ 392] x 100 = 29.59%
Formula
Percentage change = [(508 - 392) / 392] x 100
Subtract the new number by the original number
508 - 392 = 116
116 ÷ 392 = 0.29591836734693877
0.29591836734693877 x 100 = 29.59%