Which values of a, b, and c correctly represent the answer in simplest form?

3 and one-half divided by 2 and one-fourth = a StartFraction b Over c EndFraction
a = 1, b = 5, c = 9
a = 10, b = 18, c = 1
a = 9, b = 5, c = 1
a = 1, b = 10, c = 18

1 answer

To solve the problem, we need to divide \(3 \frac{1}{2}\) by \(2 \frac{1}{4}\).

  1. Convert mixed numbers to improper fractions:

    • \(3 \frac{1}{2} = 3 \cdot 2 + 1 = 6 + 1 = 7\), so \(3 \frac{1}{2} = \frac{7}{2}\).
    • \(2 \frac{1}{4} = 2 \cdot 4 + 1 = 8 + 1 = 9\), so \(2 \frac{1}{4} = \frac{9}{4}\).
  2. Perform the division of fractions: \[ \frac{7}{2} \div \frac{9}{4} = \frac{7}{2} \cdot \frac{4}{9} = \frac{7 \cdot 4}{2 \cdot 9} = \frac{28}{18} \]

  3. Simplify the fraction \(\frac{28}{18}\):

    • Find the greatest common divisor (GCD) of 28 and 18, which is 2. \[ \frac{28 \div 2}{18 \div 2} = \frac{14}{9} \]
  4. Express \(\frac{14}{9}\) in the form of \( a \frac{b}{c} \): Here, \(a = 1\), \(b = 5\), and \(c = 9\).

From the provided options, we see:

  • The simplest form of the answer is \(\frac{14}{9} = 1 \frac{5}{9}\), aligning with the values of \(a = 1\), \(b = 5\), \(c = 9\).

Thus, the correct answer is: a = 1, b = 5, c = 9.