199.07% is the change from 321 to 960
Calculation steps:
[( 960 - 321 ) ÷ 321] x 100 = 199.07%
Formula
Percentage change = [(960 - 321) / 321] x 100
Subtract the new number by the original number
960 - 321 = 639
639 ÷ 321 = 1.9906542056074767
1.9906542056074767 x 100 = 199.07%