All SAT Math Resources
Example Questions
Example Question #11 : How To Order Fractions From Least To Greatest Or From Greatest To Least
Order the following fractions from least to greatest:
To solve this problem, let's find the least common denominator for our fractions.
is the lowest number that each of our current denominators are factors of.
Now, let's rewrite each fraction so that its denominator is .
Then we can rearrange these new fractions from least to greatest, keeping in mind what they're reduced forms were.
Then, by either simplifying these fractions or by remembering their original forms, we can see that the order of our fractions from least to greatest is:
Example Question #11 : Ordering Fractions
Which of the following fractions is the smallest?
1/3, 115/276, 112/350, 1050/3330, 0.75/2
1/3, 115/276, 112/350, 1050/3330, 0.75/2
First you need to put the fractions in ascending order:
1050/3330, 112/350, 1/3, 0.75/2, 115/276
Then choose the fraction with the smallest value (1050/3330).
Example Question #472 : Arithmetic
Order from greatest to least:
Rewrite the numbers in terms of the least common denominator, which is :
Comparing numerators, we see that
It follows that
and
,
making this the correct order.
Example Question #11 : Fractions
Order from least to greatest:
Express all three fractions in terms of their least common denominator - the least common multiple of denominators 7, 8, and 12, which is 168. Do this by multiplying the numerator and denominator in each fraction by whatever number yields a product of 168 in the denominator.
;
it follows that
,
so
Example Question #12 : Ordering Fractions
Which of the following five numbers is the greatest?
For each fraction, divide the numerator by the denominator. This is shown below for each fraction to three decimal places:
From the decimal representations, can be seen to be the greatest of the five choices.
Example Question #13 : Fractions
Solve each problem and decide which is the best of the choices given.
There is a bag with green marbles, red marbles, purple marbles, and blue marbles. What is the probability that a red marble is randomly chosen from the bag?
To find the probability of a red marble being randomly chosen, you have to divide the number of red marbles by the total number of marbles.
There are red, and total,
thus, creating the fraction
.
To find the percentage, simply divide by and multiply the result by to get .
Example Question #14 : Fractions
Determine the approximate percentage given the fraction .
Because a fraction is a part of a whole , set up a proportion.
The fraction is approximately .
Example Question #11 : Fractions
Bob and Jill go eat dinner at a fancy restaurant. Bob gets lobster and Jill gets crab legs. The lobster cost , and the crab legs cost . If they leave tip, how much is the combined bill?
To do this, we need to sum up each meal, and then convert the tip into a decimal.
Example Question #1 : How To Divide Complex Fractions
Simplify:
Rewrite this complex fraction using a division sign.
Take the reciprocal of the second term and change the division of the division sign. Simplify.
Example Question #1 : Complex Fractions
Solve:
First reduce the fraction. We can divide both the numerator and the denominator by 3.
Now our expression looks like this:
When you add or subtract fractions, you need to have the same denominator. The lowest common deonminator here is 2. So we need to multiply and solve:
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