33% is the change from 503 to 669
Calculation steps:
[( 669 - 503 ) ÷ 503] x 100 = 33%
Formula
Percentage change = [(669 - 503) / 503] x 100
Subtract the new number by the original number
669 - 503 = 166
166 ÷ 503 = 0.33001988071570576
0.33001988071570576 x 100 = 33%