343.59% is the change from 39 to 173
Calculation steps:
[( 173 - 39 ) ÷ 39] x 100 = 343.59%
Formula
Percentage change = [(173 - 39) / 39] x 100
Subtract the new number by the original number
173 - 39 = 134
134 ÷ 39 = 3.4358974358974357
3.4358974358974357 x 100 = 343.59%