108.1% is the change from 321 to 668
Calculation steps:
[( 668 - 321 ) ÷ 321] x 100 = 108.1%
Formula
Percentage change = [(668 - 321) / 321] x 100
Subtract the new number by the original number
668 - 321 = 347
347 ÷ 321 = 1.0809968847352025
1.0809968847352025 x 100 = 108.1%