13.75% is the change from 538 to 612
Calculation steps:
[( 612 - 538 ) ÷ 538] x 100 = 13.75%
Formula
Percentage change = [(612 - 538) / 538] x 100
Subtract the new number by the original number
612 - 538 = 74
74 ÷ 538 = 0.137546468401487
0.137546468401487 x 100 = 13.75%