106.85% is the change from 321 to 664
Calculation steps:
[( 664 - 321 ) ÷ 321] x 100 = 106.85%
Formula
Percentage change = [(664 - 321) / 321] x 100
Subtract the new number by the original number
664 - 321 = 343
343 ÷ 321 = 1.0685358255451713
1.0685358255451713 x 100 = 106.85%