Final answer:
The ratio 3:8 can be written as the fraction 3/8 in simplest form, where the numerator represents the first quantity and the denominator represents the second quantity.
Step-by-step explanation:
To write the ratio 3:8 as a fraction in simplest form, we can write it as 3/8. The ratio 3:8 means that there are 3 parts of one quantity for every 8 parts of another quantity.
When we write it as a fraction, the numerator represents the first quantity (3) and the denominator represents the second quantity (8). This fraction cannot be simplified any further, so the simplest form is 3/8.