Question

A family's bill was $125. If tax is 4.5% and they tip 10%, how much do they pay?

Answer 1

$143.13

Explanation:

Tax and tip are added to the bill to obtain the total paid. The tip here is presumed to be figured on the original bill amount, so we have ...

total paid = bill + 4.5% × bill + 10% × bill

= bill × (1 +4.5% +10%)

= bill × 1.145

total paid = $125 × 1.145 = $143.13

The family pays $143.13.