28.63% is the change from 503 to 647
Calculation steps:
[( 647 - 503 ) ÷ 503] x 100 = 28.63%
Formula
Percentage change = [(647 - 503) / 503] x 100
Subtract the new number by the original number
647 - 503 = 144
144 ÷ 503 = 0.28628230616302186
0.28628230616302186 x 100 = 28.63%