56.98% is the change from 344 to 540
Calculation steps:
[( 540 - 344 ) ÷ 344] x 100 = 56.98%
Formula
Percentage change = [(540 - 344) / 344] x 100
Subtract the new number by the original number
540 - 344 = 196
196 ÷ 344 = 0.5697674418604651
0.5697674418604651 x 100 = 56.98%