3431.58% is the change from 19 to 671
Calculation steps:
[( 671 - 19 ) ÷ 19] x 100 = 3431.58%
Formula
Percentage change = [(671 - 19) / 19] x 100
Subtract the new number by the original number
671 - 19 = 652
652 ÷ 19 = 34.31578947368421
34.31578947368421 x 100 = 3431.58%