Scale Drawings and Fractions

The video tutorial explains how to work with scale factors, particularly when given as percentages. It starts by introducing the concept of scale factors and how they relate to percentages. The tutorial then provides a detailed example of creating a 300% scale drawing, explaining how to convert percentages into fractions and simplify them to find the scale factor. It further explores a more complex example with a 175% scale factor, demonstrating the calculation process. The video concludes with a summary of the key points discussed.

What is a scale factor in the context of scale drawings?

• A type of angle

• A ratio comparing corresponding sides of copies and originals

• A measure of time

• A unit of length

How can you convert a percentage into a fraction?

• Subtract 20

• Add 50

• Divide by 100

• Multiply by 10

What does the fraction bar represent in a percentage?

• The word 'per'

• The word 'and'

• The word 'but'

• The word 'or'

Why is it important to simplify fractions when working with scale factors?

• To increase the scale

• To change the shape

• To make calculations easier

• To decrease the scale

What does 'Cent' represent in the context of percentages?

• 50

• 10

• 100

• 200

What is the first step in simplifying a fraction?

• Multiply the numerator and denominator by 2

• Subtract 10 from the denominator

• Add 10 to the numerator

• Divide the numerator and denominator by a common factor

What is the scale factor for a 300% scale drawing?

• 3/1

• 1/3

• 1/2

• 2/1

If the original side is 2, what will be the corresponding side in a 300% scale drawing?

• 10

• 8

• 6

• 4

What is the first step in creating a 175% scale drawing?

• Add 100 to the percentage

• Convert the percentage to a fraction

• Multiply by 2

• Divide by 2

What is the simplified scale factor for a 175% scale drawing?

• 9/4

• 7/4

• 5/4

• 3/2