108.13% is the change from 320 to 666
Calculation steps:
[( 666 - 320 ) ÷ 320] x 100 = 108.13%
Formula
Percentage change = [(666 - 320) / 320] x 100
Subtract the new number by the original number
666 - 320 = 346
346 ÷ 320 = 1.08125
1.08125 x 100 = 108.13%