48.24% is the change from 340 to 504
Calculation steps:
[( 504 - 340 ) ÷ 340] x 100 = 48.24%
Formula
Percentage change = [(504 - 340) / 340] x 100
Subtract the new number by the original number
504 - 340 = 164
164 ÷ 340 = 0.4823529411764706
0.4823529411764706 x 100 = 48.24%