Julia21ab
20

# how many tenths are equal to 4/5?

There are two ways to solve this. You can either cross-multiply or find a common denominator. They're pretty similar, but you can use whichever one makes more sense to you. Cross-Multiplying : $\frac{4}{5}$ =  $\frac{x}{10}$   Mutiply the numerator by the     denominator and the other numerator by the other denominator. 4(10) = 5x   Multiply    40 = 5x   Divide      8 = x Common denominator: $\frac{4}{5}$ = $\frac{x}{10}$   Finding a common denominator helps you make equivalent fractions, or fractions with the same value. You can do this by finding a number that both denominators fit into. In this case, 5 and 10 both fit into 10. Now, you make $\frac{4}{5}$ into a fraction with a denominator of 2 by multiplying it by $\frac{2}{2}$. $\frac{4(2)}{5(2)}$   And simplify. $\frac{8}{10}$ Either way, $\frac{4}{5}$ is $\frac{8}{10}$.