687.18% is the change from 39 to 307
Calculation steps:
[( 307 - 39 ) ÷ 39] x 100 = 687.18%
Formula
Percentage change = [(307 - 39) / 39] x 100
Subtract the new number by the original number
307 - 39 = 268
268 ÷ 39 = 6.871794871794871
6.871794871794871 x 100 = 687.18%