Understanding Rates and Ratios

The video tutorial explains the concept of rates, which compare two quantities with different units. It provides examples such as calculating the cost per liter of milk, converting currency from Rand to dollars, and determining hourly earnings from monthly salary. Each example demonstrates the importance of including units in calculations and how to perform division to find rates.

What is a rate?

• A measure of distance

• A type of currency

• A comparison between two quantities of different units

• A comparison between two quantities of the same unit

In the example of speed, what are the two units being compared?

• Miles and hours

• Kilometers and hours

• Kilometers and minutes

• Meters and seconds

How do you calculate the cost per liter of milk if 3 liters cost 50 Rand?

• Subtract 3 from 50

• Add 50 and 3

• Divide 50 by 3

• Multiply 50 by 3

What is the cost per liter of milk if 3 liters cost 50 Rand?

• 16 Rand 67 cents

• 15 Rand 50 cents

• 17 Rand 33 cents

• 18 Rand 20 cents

If the exchange rate is 17.35 Rand to 1 US dollar, how many dollars will you get for 1000 Rand?

• 56.75 dollars

• 58.00 dollars

• 59.10 dollars

• 57.64 dollars

What is the exchange rate mentioned in the video?

• 18.00 Rand to 1 US dollar

• 15.75 Rand to 1 US dollar

• 17.35 Rand to 1 US dollar

• 16.50 Rand to 1 US dollar

How many hours does Aaron work in a month if he works 8 hours a day, 6 days a week?

• 180 hours

• 210 hours

• 200 hours

• 192 hours

What is Aaron's hourly earning if he earns 4500 yen per month?

• 23 Rand 44 cents

• 24 Rand 10 cents

• 25 Rand 50 cents

• 22 Rand 30 cents

How do you calculate the number of hours worked in a month?

• Multiply daily hours by days in a week and weeks in a month

• Divide daily hours by days in a week

• Add daily hours to days in a week

• Subtract daily hours from days in a week

What is the total number of days Aaron works in a week?

• 6 days

• 5 days

• 4 days

• 7 days