1671.79% is the change from 39 to 691
Calculation steps:
[( 691 - 39 ) ÷ 39] x 100 = 1671.79%
Formula
Percentage change = [(691 - 39) / 39] x 100
Subtract the new number by the original number
691 - 39 = 652
652 ÷ 39 = 16.71794871794872
16.71794871794872 x 100 = 1671.79%