29.6% is the change from 500 to 648
Calculation steps:
[( 648 - 500 ) ÷ 500] x 100 = 29.6%
Formula
Percentage change = [(648 - 500) / 500] x 100
Subtract the new number by the original number
648 - 500 = 148
148 ÷ 500 = 0.296
0.296 x 100 = 29.6%
Example