21.67% is the change from 503 to 612
Calculation steps:
[( 612 - 503 ) ÷ 503] x 100 = 21.67%
Formula
Percentage change = [(612 - 503) / 503] x 100
Subtract the new number by the original number
612 - 503 = 109
109 ÷ 503 = 0.21669980119284293
0.21669980119284293 x 100 = 21.67%