107.44% is the change from 390 to 809
Calculation steps:
[( 809 - 390 ) ÷ 390] x 100 = 107.44%
Formula
Percentage change = [(809 - 390) / 390] x 100
Subtract the new number by the original number
809 - 390 = 419
419 ÷ 390 = 1.0743589743589743
1.0743589743589743 x 100 = 107.44%