Hi Sara,
We can solve this problem by setting up the ratio:
(3 cups water)/(1 cup rice) = (5 cups water)/(X cups rice)
To find how many cups of rice we need, let's solve for x:
3/1 = 5/x Simplify
3=5/x Multiply both sides by x
3x=5 Isolate the x
x=5/3
∴We need (5/3) cups of rice for our given 5 cups of water.
Best,
Star