50% is the change from 344 to 516
Calculation steps:
[( 516 - 344 ) ÷ 344] x 100 = 50%
Formula
Percentage change = [(516 - 344) / 344] x 100
Subtract the new number by the original number
516 - 344 = 172
172 ÷ 344 = 0.5
0.5 x 100 = 50%
Example