109.69% is the change from 320 to 671
Calculation steps:
[( 671 - 320 ) ÷ 320] x 100 = 109.69%
Formula
Percentage change = [(671 - 320) / 320] x 100
Subtract the new number by the original number
671 - 320 = 351
351 ÷ 320 = 1.096875
1.096875 x 100 = 109.69%