All PSAT Math Resources
Example Question #142 : Arithmetic
To make 48 cookies you need 1 cup white sugar, 1 cup packed brown sugar and 3 cups of flour. You want to make 12 cookies, so you adjust the ingredients accordingly. After the adjustment, how many total cups of dry ingredients do you have?
1 1/4 c
1 1/2 c
1 3/4 c
1 1/4 c
Going from 48 cookies to 12 cookies is a scaling factor of 1/4, so all the ingredients get multiplied by 1/4. In order to make 12 cookies you will need 1/4 c white sugar, 1/4 c packed brown sugar, and 3/4 c flour. Added all together you get 5/4 or 1 1/4 c.
Example Question #143 : Arithmetic
What is written as a mixed number?
How many times does 12 go into 17? Once with a remainder of 5.
Example Question #144 : Arithmetic
If , what does equal?
First, you must solve the equation for . Then, you must convert the answer's improper fraction to a mixed fraction.
Solve for .
Now, to convert an improper fraction, you must see how many times the denominator goes into the numerator, and then leave the remainder as a fraction. Example below:
Find out how many times the denominator goes into the numerator: