A restaurant customer left ​$1.10 as a tip. The tax was 77% and the tip was 10% of the cost including tax. What was the total​ bill?

Answer 1

Let x = original cost of the meal

The 10% tip was calculated AFTER the tax of 7.7% was added to the bill.

So the cost of the meal was x + 0.077x = 1.077x

If we take 10% of that expression we have the amount of tip.

0.10 (1.077x) = 1.10

1.077x = 1.1 / .1

1.077x = 11

x = 11/1.077 ≈ $10.21

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