SSAT Elementary Level Math : Ratio and Proportion
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All SSAT Elementary Level Math Resources
Example Questions
Example Question #16 : How To Find A Proportion
What is 
Example Question #31 : Ratio And Proportion
Megan's teacher says that if Megan wants to join the girl's basketball team, she has to have at least 
In order to solve this problem, we need to make a ratio. Megan's teacher says she needs to have turned in 90% of her homework. First we need to change 90% into a fraction:
Using this information, we need to fill in the following ratio to find out how many assignments Megan needs to have turned in to be at 90% completion:
To solve this ratio, we need to cross multiply.
Now we have an equation to solve.
If we divide both sides by 100, we are left with our final answer.
Megan must have at least 45 assignments turned in if she wants to join the basketball team.
Example Question #31 : Numbers And Operations
If I have 6 red marbles and 5 blue marbles, what proportion of the marbles are red.
To find a proportion, simply divide what you desire by the total.
In this problem the desired is the number of red marbles and the total is all of the marbels.
Thus,
Example Question #32 : Numbers And Operations
I have 7 green marbles and 4 blue marbles. Find the proportion of green marbles.
To find a proportion, simply divide the desired amount by the total amount. We know our total by simply adding the marble amounts that compose it. Thus,
Example Question #33 : Numbers And Operations
Solve the following proportion:
When solving a proportion, it is easiest to re-write it using fraction. So,
can be re-written as
Now, to solve this, we will cross multiply and divide.
To cross multiply, we will take the numerator of the first fraction and multiply it by the denominator of the second fraction. Then, we multiply the denominator of the first fraction by the numerator in the second, and set them equal to each other.
It might be easier to see an example.
Now, we divide to solve for x.
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All SSAT Elementary Level Math Resources
