18 / 100 = 0.18
$10 x 0.18 = 1.80
$10 + 1.80 = 11.80
Formula: Tip = $10 x (18 / 100) = 1.80
| Tip % | Tip Amount | Total |
|---|---|---|
| 15% | $1.50 | $11.50 |
| 18% | $1.80 | $11.80 |
| 20% | $2.00 | $12.00 |
| 22% | $2.20 | $12.20 |
| 25% | $2.50 | $12.50 |
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