Using the concept of rational numbers, it is found that the best method Toby could use is a multiplication of fractions, as the product of two fractions(two rational numbers) is always a fraction(rational number).
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- A rational number, no matter if an integer, a finite decimal or a repeating decimal can always be represented by a fraction.
- The product of two fractions will always result in a fraction, as the numerator of the multiplication is the multiplication of the numerator of the factors, and same for the denominator.
- Thus, since the product of two fractions is always a fraction, the product of two rational numbers is always a rational number.
A similar problem is given at https://brainly.com/question/10814303
