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

| Numerator 1 x Numerator 2 | |
| Denominator 1 x Denominator 2 |
Numerator 1 = 5,
Denominator 1 = 1,
Numerator 2 = 1,
Denominator 2 = 4, so we have:
| 5 x 1 | |
| 1 x 4 |
| 5 | |
| 4 |
| Answer = | 5 |
| 4 |
Our fraction is already reduced.
This means our fraction has a Greatest Common Factor (GCF) = 1.
Therefore, we have our answer:
Answer = 5/4