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Name:________________________ Hour:______________ Date:_____________
Working with Proportions and Ratios
1. What is a proportion?
2. What is a ratio?
3. As you set up proportions, look at the following site to write one of their examples of a problem and its proportion. Please solve the proportion, showing your work.
4. As we work through solving proportions, look at the method of cross multiplication. Use this method to solve the following problems with your calculator.
a. x/25 = 15/100 b. m/20 = 28/34
c. 15/n = 200/100 d. 1245/200 = 55/x
5. Look at the following problems. Do the first four problems given, writing their answers below.
a.
b.
c.
d.
6. Given the Word Problems, (scroll half-way down the page to word problems) write a proportion for each of the first two problems below. Please solve them, showing your work.
a.
b.
7. Looking over the ratio examples, scroll half-way down the page and do problems one and two. There are two parts to each, please answer them.
a. _____________, ________________
b. _____________, ________________
8. With all the practice you have now had and looking at these examples of setting up proportions and writing ratios, Please write a problem of your own. You may either choose a proportion or ratio problem.