Question

Please I need help with this question

Answer 1

$5.40

Explanation:

First, find Dave's purchase. To do this, you multiply 15 by the tax percent and add that to the original.

So:

15 x 8% = 15 x 0.08 = 1.2

15 + 1.2 = 16.2

Next, do the same for Mel's purchase:

20 x 8% = 20 x 0.08 = 1.6

20 + 1.6 = 21.6

Then, you subtract Dave's purchase from Mel's:

21.6 - 16.2 = 5.4

This comes out to $5.40

Answer 2

Mel pays 20 * (1+0.08) = $21.6
Dave pays 15 * (1+0.08) = $16.2
So the difference is:
$21.6-$16.2 = $5.4