779.49% is the change from 39 to 343
Calculation steps:
[( 343 - 39 ) ÷ 39] x 100 = 779.49%
Formula
Percentage change = [(343 - 39) / 39] x 100
Subtract the new number by the original number
343 - 39 = 304
304 ÷ 39 = 7.794871794871795
7.794871794871795 x 100 = 779.49%