66.2% is the change from 503 to 836
Calculation steps:
[( 836 - 503 ) ÷ 503] x 100 = 66.2%
Formula
Percentage change = [(836 - 503) / 503] x 100
Subtract the new number by the original number
836 - 503 = 333
333 ÷ 503 = 0.6620278330019881
0.6620278330019881 x 100 = 66.2%