Multiplying 2 fractions involves multiplying both numerators divided by both denominators.

| Numerator 1 x Numerator 2 | |
| Denominator 1 x Denominator 2 |
Numerator 1 = 45,
Denominator 1 = 1,
Numerator 2 = 1,
Denominator 2 = 5, so we have:
| 45 x 1 | |
| 1 x 5 |
| 45 | |
| 5 |
(1/5) x 45 = 9
(1/5) x 5 = 1
Since our reduced answer is a whole number, we remove the one from the denominator and write it as:
Answer = 9