[tex] \frac{5}{15} [/tex] is the same as [tex] \frac{1}{3} [/tex] because [tex] \frac{(5 divided by 5)}{(15 divided by 5)} [/tex]
You have to divide the numerator with the same number that you divide the denominator with. therefore, the answer to the second one is
[tex] \frac{2}{3} [/tex] because [tex] \frac{(8 divided by 4)}{(12 divided by 4)} [/tex]
