1. The problem is to find the value of $2.21 \div 1.7$. 2. The division formula is $\text{Dividend} \div \text{Divisor} = \text{Quotient}$. 3. Perform the division: $$2.21 \div 1.7 = \frac{2.21}{1.7}$$ 4. To simplify, multiply numerator and denominator by 10 to remove decimals: $$\frac{2.21 \times 10}{1.7 \times 10} = \frac{22.1}{17}$$ 5. Now divide 22.1 by 17: - $17 \times 1 = 17$ - $22.1 - 17 = 5.1$ - Bring down decimal, $5.1 \div 17 \approx 0.3$ 6. So, $22.1 \div 17 \approx 1.3$. 7. Therefore, the answer is $1.3$. Final answer: a. 1.3