We have 3 dark gray pieces on our spinner out of a total of 8 pieces on the spinner. The portion of the spinner that is dark gray is given by the ratio between those two quantities.
[tex]\frac{3}{8}[/tex]
When we multiply the numerator and denominator of a fraction by the same number, the fraction stays with the same value.
[tex]\frac{3}{8}=\frac{6}{16}=\frac{9}{24}=\ldots[/tex]
