145.35% is the change from 344 to 844
Calculation steps:
[( 844 - 344 ) ÷ 344] x 100 = 145.35%
Formula
Percentage change = [(844 - 344) / 344] x 100
Subtract the new number by the original number
844 - 344 = 500
500 ÷ 344 = 1.4534883720930232
1.4534883720930232 x 100 = 145.35%