Exam 14: Developing Aspects of Proportional Reasoning: Ratio, Proportion, and Percent

If Sally saw a sign in the grocery store advertising bananas for 2 lbs. for $0.85, and she needed 8 lbs., which of the following meaning of ratios would she have to use to determine the amount of money she would have to spend?

A sweater that originally sold for $30.00 is on sale at 20% off. After the sale, by how much must the sale price be increased to return to the pre-sale price of $30.00?

The last proportion-solving strategy that students should learn in middle school grades is using:

Two rectangles have similar shapes. The side lengths of one rectangle are 6 cm and 12 cm. The longer side of the second rectangle is 32 in. What is the length of the shorter side in the second rectangle?

Which of the proportions below is equivalent to ?

The tip left for a meal was $6.30. If the tip was calculated at the customary rate of 18%, what was the price of the meal?

How could the following problem be solved on a multiples table?  Two days out of every seven days are weekend days. How many weekend days are there in 56 days?

Competing brands of shampoo sell with the following prices: Brand A: 12 ounces for $0.99 Brand B: 16 ounces for $1.49 Which is the better buy?

A pair of shoes that normally sells for $80.00 is on sale for $50.00. What is the percent discount?