17.5% is the change from 543 to 638
Calculation steps:
[( 638 - 543 ) ÷ 543] x 100 = 17.5%
Formula
Percentage change = [(638 - 543) / 543] x 100
Subtract the new number by the original number
638 - 543 = 95
95 ÷ 543 = 0.17495395948434622
0.17495395948434622 x 100 = 17.5%