Converting fractions into a ratio Revision Card

Find the fractions belonging to the two categories. If there are only two, they add to 1.

Find the fractions belonging to the two categories. If there are only two, they add to 1.
Write those fractions as a ratio in the required order.
Multiply both parts by a common denominator, then simplify.

Example 1

of the counters are red. The rest are blue. Find red : blue.

There are only two colours.

Multiply both fractions by 5.

of the counters are red. The rest are blue. Find red : blue.

There are only two colours.

Multiply both fractions by 7.

Remember
Use the worked steps to check your method, not just the final answer.

Question 1

of the counters are red. The rest are blue. Find red : blue.

Check answer

There are only two colours.

Multiply both fractions by 9.

Question 2

of the counters are red. The rest are blue. Find red : blue.

Check answer

There are only two colours.

Multiply both fractions by 11.

Question 3

of the counters are red. The rest are blue. Find red : blue.

Check answer

There are only two colours.

Multiply both fractions by 13.

Question 4

of the counters are red. The rest are blue. Find red : blue.

Check answer

There are only two colours.

Multiply both fractions by 15.

Question 5

of the counters are red. The rest are blue. Find red : blue.

Check answer

There are only two colours.

Multiply both fractions by 17.