102.81% is the change from 320 to 649
Calculation steps:
[( 649 - 320 ) ÷ 320] x 100 = 102.81%
Formula
Percentage change = [(649 - 320) / 320] x 100
Subtract the new number by the original number
649 - 320 = 329
329 ÷ 320 = 1.028125
1.028125 x 100 = 102.81%