Common Denominators and Fractions

The video tutorial covers subtracting fractions, starting with simple examples and progressing to more complex problems. It explains the importance of finding a common denominator and demonstrates how to simplify fractions before subtraction. The tutorial also includes a section on calculating the change in y for a linear equation involving fractions.

What is the least common denominator for the fractions 2/3 and 1/4?

• 8

• 12

• 6

• 10

When subtracting 15/11 and 9/7, what is the common denominator used?

• 49

• 77

• 121

• 99

What is the result of 15/11 minus 9/7?

• 5/77

• 7/77

• 6/77

• 8/77

How can 9/39 be simplified before subtracting from 7/27?

• 5/18

• 2/9

• 1/4

• 3/13

What is the common denominator for 7/27 and 3/13?

• 270

• 312

• 351

• 390

What is the result of 7/27 minus 3/13?

• 10/351

• 12/351

• 8/351

• 9/351

What is the least common multiple of 64 and 40?

• 480

• 400

• 320

• 240

What is the result of 13/64 minus 7/40?

• 11/320

• 9/320

• 8/320

• 10/320

What is the value of y when x = 1 in the equation y = 2/3x + 1/2?

• 8/6

• 9/6

• 7/6

• 5/6

What is the change in y when x changes from 1 to 2 in the equation y = 2/3x + 1/2?

• 1/3

• 2/3

• 3/3

• 4/3