Using Ratio Tables to Solve Problems

This video tutorial teaches how to solve problems using ratio tables, focusing on both addition and multiplication methods. It highlights common mistakes students make, such as adding the same number to both rows instead of maintaining the ratio. The lesson uses a practical example of calculating the number of blue cars in a parking lot, given a percentage, to demonstrate the application of ratio tables. The tutorial concludes by reinforcing the correct use of ratio tables to solve problems accurately.

What is a common mistake students make when using ratio tables?

• Adding the same number to both rows

• Using subtraction instead of addition

• Multiplying by different numbers in each row

• Ignoring the total number of items

If 60% of the cars in a parking lot are blue, how many blue cars are there if the total number of cars is 300?

• 200

• 180

• 150

• 120

What is the first step in setting up a ratio table for the given problem?

• Determine the total number of cars

• Identify the percentage of blue cars

• Calculate the number of blue cars directly

• Fill in the initial ratio of blue to total cars

How do you use multiplication in a ratio table to find the number of blue cars?

• Multiply the total number of cars by 60

• Multiply each row by the same number to maintain the ratio

• Multiply the total number of cars by the percentage

• Multiply the number of blue cars by 100

What is the final number of blue cars calculated using the ratio table?

• 200

• 180

• 150

• 120