Answer:
$10.50 is the tip on a dinner bill.
Explanation:
The first step is to round off $67.42. It is closer to 70 than 60, therefore it is 70.
Secondly, 10% of 70 is 7.
5% of 7 is 3.5.
*Notice that 10% and 5% equals 15%.
Add 7 + 3.5 = 10.5 or $10.50