75.29% is the change from 344 to 603
Calculation steps:
[( 603 - 344 ) ÷ 344] x 100 = 75.29%
Formula
Percentage change = [(603 - 344) / 344] x 100
Subtract the new number by the original number
603 - 344 = 259
259 ÷ 344 = 0.752906976744186
0.752906976744186 x 100 = 75.29%