51.88% is the change from 320 to 486
Calculation steps:
[( 486 - 320 ) ÷ 320] x 100 = 51.88%
Formula
Percentage change = [(486 - 320) / 320] x 100
Subtract the new number by the original number
486 - 320 = 166
166 ÷ 320 = 0.51875
0.51875 x 100 = 51.88%