All ACT Math Resources
Example Question #36 : Proportion / Ratio / Rate
A pie is made up of crust, apples, and sugar, and the rest is jelly. What is the ratio of crust to jelly?
A pie is made up of crust, apples, sugar, and the rest is jelly. What is the ratio of crust to jelly?
To compute this ratio, you must first ascertain how much of the pie is jelly. This is:
Begin by using the common denominator :
So, the ratio of crust to jelly is:
This can be written as the fraction:
Example Question #37 : Proportion / Ratio / Rate
In a solution, of the fluid is water, is wine, and is lemon juice. What is the ratio of lemon juice to water?
This problem is really an easy fraction division. You should first divide the lemon juice amount by the water amount:
Remember, to divide fractions, you multiply by the reciprocal:
This is the same as saying:
Example Question #38 : Proportion / Ratio / Rate
If and , what is the ratio of to ?
To find a ratio like this, you simply need to make the fraction that represents the division of the two values by each other. Therefore, we have:
Recall that division of fractions requires you to multiply by the reciprocal:
which is the same as:
This is the same as the ratio: