51.25% is the change from 320 to 484
Calculation steps:
[( 484 - 320 ) ÷ 320] x 100 = 51.25%
Formula
Percentage change = [(484 - 320) / 320] x 100
Subtract the new number by the original number
484 - 320 = 164
164 ÷ 320 = 0.5125
0.5125 x 100 = 51.25%