22.09% is the change from 344 to 420
Calculation steps:
[( 420 - 344 ) ÷ 344] x 100 = 22.09%
Formula
Percentage change = [(420 - 344) / 344] x 100
Subtract the new number by the original number
420 - 344 = 76
76 ÷ 344 = 0.22093023255813954
0.22093023255813954 x 100 = 22.09%