3109.52% is the change from 21 to 674
Calculation steps:
[( 674 - 21 ) ÷ 21] x 100 = 3109.52%
Formula
Percentage change = [(674 - 21) / 21] x 100
Subtract the new number by the original number
674 - 21 = 653
653 ÷ 21 = 31.095238095238095
31.095238095238095 x 100 = 3109.52%