Percentage increase of two percentages

Question

Can anyone help me with this problem? What is the percentage increase from 27.7% to 28.2%? I came up with 1.8% but my brother keeps telling me it's 18%

Answer 1

$$\frac{28.2}{27.7}\approx1,018$$

So the answer is $100(1.018-1)=1.8$%