IXL | Estimate tips | 8th grade math

Estimate the amount of the tip by rounding the bill to the nearest dollar before calculating.

20% tip on a bill of $14.92

The amount of the tip is approximately $.

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Learn with an example

Estimate the amount of the tip by rounding the bill to the nearest dollar before calculating.

20% tip on a bill of $99.55

The amount of the tip is approximately $.

Round $99.55 to the nearest dollar.

$99.55 → $100

Find 10% of $100.

$100

$10

Now double that result. That will give you 20% of $100.

2 × $10 = $20

20% tip on a bill of $99.55 is approximately $20.

Compare your estimate to the exact answer:

Estimate: 20% of $99.55 ≈ 20% of $100 = $20

Exact answer: 20% of $99.55 = $19.91

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