136.34% is the change from 344 to 813
Calculation steps:
[( 813 - 344 ) ÷ 344] x 100 = 136.34%
Formula
Percentage change = [(813 - 344) / 344] x 100
Subtract the new number by the original number
813 - 344 = 469
469 ÷ 344 = 1.3633720930232558
1.3633720930232558 x 100 = 136.34%