Answer:
[tex]\frac{9}{45}=\frac{8}{40}[/tex]
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
[tex]\frac{9}{45}=\frac{8}{40}\\\frac{1}{5}=\frac{1}{5}[/tex]
As you can observe, the first choice represent equivalent raitos, so it must be part of the answer.
[tex]\frac{8}{12}= \frac{12}{21} \\\frac{2}{3}= \frac{4}{7}[/tex]
This choice doesn't represent a proportion.
[tex]\frac{8}{12}= \frac{12}{15} \\\frac{2}{3}= \frac{4}{5}[/tex]
The third choice doesn't represent a proportion.
[tex]\frac{9}{22}= \frac{14}{28}[/tex]
The fourth choice doesn't represent a proportion neither.
Therefore, the right answer is the first option.
[tex]\frac{9}{45}=\frac{8}{40}[/tex]
