134.49% is the change from 345 to 809
Calculation steps:
[( 809 - 345 ) ÷ 345] x 100 = 134.49%
Formula
Percentage change = [(809 - 345) / 345] x 100
Subtract the new number by the original number
809 - 345 = 464
464 ÷ 345 = 1.344927536231884
1.344927536231884 x 100 = 134.49%