Fractions

Fractions

Finding a Fraction of Something:

Example: What is 9/20 of £3

 9/20 of £360 = 9/20 x 360

                       = (£360 divide 20) x 9

                       = £18 x 9

                       = £162

Mixed Numbers:

Example: Write 4 2/3 as an improper fraction.

4 2/3 = 4 + 2/3

4 + 2/3 = 12/3 + 2/3 = 12 + 2 divide 3 = 14/ 3

Learn the Golden Rule for Proportion Questions

Example: 5 pints of milk cost £1.30. How much will 3 pints cost?

The GOLDEN RULE says: Divide for ONE, Then Times For ALL

Which means: Divide the price by 5 to find how much FOR ONE PINT, then multiply by 3 to find how much FOR 3 PINTS.

So for 1 pint: £1.30 divide 5 = 0.26 = 26p

For 3 pints:  26p x 3 = 78p