Question

as a science experiment, mo and jo want to send their model rocket into space. they need $\frac{1}{3}$ pound of gravitium and $\frac{1}{9}$ pound of expando. what is the combined weight of these two components? the combined weight is pound (type a whole number or a simplified fraction)

Explanation:

Step1: Find a common denominator

The common - denominator of 3 and 9 is 9.

Step2: Rewrite $\frac{1}{3}$ with the common denominator

$\frac{1}{3}=\frac{1\times3}{3\times3}=\frac{3}{9}$

Step3: Add the two fractions

$\frac{3}{9}+\frac{1}{9}=\frac{3 + 1}{9}=\frac{4}{9}$

Answer:

$\frac{4}{9}$