Subtract Fractions with Unlike Denominators

Unlike fractions are those fractions which have unlike denominators, E.g. 3/4 and 1/3

When subtracting unlike fractions, find the equivalent fraction with a common denominator

A common denominator can be obtained by multiplying both the denominators

To subtract like fractions, subtract the numerators and retain the denominator

Express the difference in its simplest form by dividing the numerator and the denominator by the greatest common fraction (GCF)

A clock face can be used to model fractions with 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, or 60 in the denominator

1 hour = 60 minutes

Any fraction can be converted to minutes and represented in the clock face

Similarly any measure of clock face can be represented as a fraction

To subtract two fractions, one can subtract the equivalent clock face representations and represent their difference as a fraction