[tex] \frac{10}{12} [/tex] is equivalent to both [tex] \frac{5}{6} [/tex] and ≈ 0.833 repeated. In order to find out the fraction that is equivalent to [tex] \frac{10}{12} [/tex] you need to reduce the fraction with 2. Once you do this you're left with [tex] \frac{5}{6} [/tex],, making it the equivalent fraction. In order to find out a fractions equivalent decimal,, you need to divide the top of the fraction (10) by the bottom of the fraction (12) in which case you would get ≈ 0.8333333 repeated.
Let me know if you have any further questions.
:)
