30.31% is the change from 320 to 417
Calculation steps:
[( 417 - 320 ) ÷ 320] x 100 = 30.31%
Formula
Percentage change = [(417 - 320) / 320] x 100
Subtract the new number by the original number
417 - 320 = 97
97 ÷ 320 = 0.303125
0.303125 x 100 = 30.31%