Which ratios form a proportion:
9/45 & 8/40 or

8/12 & 12/21 or

8/12 & 12/15 or

9/22 & 14/28.

Step-by-step explanation:

A proportion can be defined as the equality of two ratios. That means we have to find which option is showing equivalent ratios, or equivalent fractions. Let's examine each of them

As you can observe, the first choice represent equivalent raitos, so it must be part of the answer.

This choice doesn't represent a proportion.

The third choice doesn't represent a proportion.

The fourth choice doesn't represent a proportion neither.

Therefore, the right answer is the first option.

answer: the answer is one of

step-by-step explanation:   we are given to write a proper fraction where the whole is divided into an even number of equal parts less than ten, and an odd number of those parts exist.

an even number less than 10 may be one of 2, 4, 6 or 8. so, the whole may be one of these four evens.

now, an odd number of these parts must exist, so the numerator must be an odd number, one of 1, 3, 5 or 7. it cannot be 9 because then the fraction will become improper.

thus, our fraction may be one of the following

google dat sis

step-by-step explanation: