50% is the change from 336 to 504
Calculation steps:
[( 504 - 336 ) ÷ 336] x 100 = 50%
Formula
Percentage change = [(504 - 336) / 336] x 100
Subtract the new number by the original number
504 - 336 = 168
168 ÷ 336 = 0.5
0.5 x 100 = 50%
Example