64.21% is the change from 503 to 826
Calculation steps:
[( 826 - 503 ) ÷ 503] x 100 = 64.21%
Formula
Percentage change = [(826 - 503) / 503] x 100
Subtract the new number by the original number
826 - 503 = 323
323 ÷ 503 = 0.6421471172962226
0.6421471172962226 x 100 = 64.21%