ISEE Lower Level Quantitative : How to find a ratio

Study concepts, example questions & explanations for ISEE Lower Level Quantitative

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Example Questions

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Example Question #11 : Ratio And Proportion

In a litter of  puppies, there are  black puppies and  white puppies. What is the ratio of the number of white puppies to black puppies?

Possible Answers:

Correct answer:

Explanation:

The ratio wants us to compare the number of white puppies to the number of black puppies.

We can say the ratio of white puppies to black puppies is . When we write that as a fraction, it becomes , so we can also say that the ratio of white puppies to black puppies is  or .

Example Question #11 : Ratio And Proportion

Stacy has started collecting coins.  She has twice as many wheat pennies as she does  dimes, and three times as many  quarters as she does  dimes.  If Stacy has   dimes, what is the ratio of wheat pennies to  quarters?

Possible Answers:

Correct answer:

Explanation:

We know that Stacy has  1946 dimes.

We also know that she has twice as many wheat pennies, so we must multiply  by  to find the total number of wheat pennies.

We also know that Stacy has three times as many 1986 quarters, so we multiply  by  to find the total number of 1986 quarters.

Now our ratio of wheat pennies to 1986 quarters is , but this can be simplified because both numbers are divisible by .

So our ratio becomes 

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