137.94% is the change from 340 to 809
Calculation steps:
[( 809 - 340 ) ÷ 340] x 100 = 137.94%
Formula
Percentage change = [(809 - 340) / 340] x 100
Subtract the new number by the original number
809 - 340 = 469
469 ÷ 340 = 1.3794117647058823
1.3794117647058823 x 100 = 137.94%