1. **State the problem:** Calculate 55% of 80. 2. **Formula:** To find a percentage of a number, use the formula: $$\text{Percentage of a number} = \frac{\text{percentage}}{100} \times \text{number}$$ 3. **Apply the formula:** $$55\% \text{ of } 80 = \frac{55}{100} \times 80$$ 4. **Calculate:** $$= \frac{55}{100} \times 80 = \frac{55 \times 80}{100}$$ 5. **Simplify the fraction:** $$= \frac{\cancel{55} \times 80}{\cancel{100}} \text{ (no common factors to cancel here, so calculate directly)}$$ 6. **Multiply numerator:** $$55 \times 80 = 4400$$ 7. **Divide by denominator:** $$\frac{4400}{100} = 44$$ **Final answer:** $$55\% \text{ of } 80 = 44$$ This means 55% of 80 is 44.