Answer:
$48.91
Explanation:
100% is 1 so 7% would be 0.07
times $39.75 by 0.07 to get the amount the tax would add which is $2.78
then add the two $39.75 + $2.78 = $42.53
then remove the tip which as we saw earlier convert the 15% to 0.15
times $42.53 by 0.15 to get the amount the tip would add which is $6.38
then add $6.38 to the total amount which would be $48.91