28.88% is the change from 502 to 647
Calculation steps:
[( 647 - 502 ) ÷ 502] x 100 = 28.88%
Formula
Percentage change = [(647 - 502) / 502] x 100
Subtract the new number by the original number
647 - 502 = 145
145 ÷ 502 = 0.28884462151394424
0.28884462151394424 x 100 = 28.88%