208.41% is the change from 321 to 990
Calculation steps:
[( 990 - 321 ) ÷ 321] x 100 = 208.41%
Formula
Percentage change = [(990 - 321) / 321] x 100
Subtract the new number by the original number
990 - 321 = 669
669 ÷ 321 = 2.0841121495327104
2.0841121495327104 x 100 = 208.41%