1. **State the problem:** Juan's bill was 27 and he left a 20% tip. We need to find the amount of the tip.
2. **Formula:** Tip amount = (Percentage tip) \times (Bill amount)
3. **Convert percentage to decimal:** 20% = \frac{20}{100} = 0.20
4. **Calculate the tip:**
$$\text{Tip} = 0.20 \times 27$$
5. **Multiply:**
$$\text{Tip} = 5.4$$
6. **Answer:** The amount of the tip Juan left is 5.4.
Tip Amount 3Bb3D6
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