58.75% is the change from 320 to 508
Calculation steps:
[( 508 - 320 ) ÷ 320] x 100 = 58.75%
Formula
Percentage change = [(508 - 320) / 320] x 100
Subtract the new number by the original number
508 - 320 = 188
188 ÷ 320 = 0.5875
0.5875 x 100 = 58.75%