GCSE Maths Ratio

Front

What is a ratio?

Back

A ratio is a relationship between two numbers indicating how many times the first number contains the second.

Front

How do you simplify a ratio?

Back

To simplify a ratio, divide both terms by their greatest common divisor (GCD).

Front

If a recipe calls for a ratio of 4:7 and you have 200 grams of the first ingredient, how do you find the amount of the second ingredient needed?

Back

Set up the proportion: 4/7 = 200/x, then cross-multiply and solve for x.

Front

What is the simplest form of the ratio 10:20?

Back

The simplest form is 1:2.

Front

How do you express the ratio of two quantities in simplest form?

Back

Divide both quantities by their GCD.

Front

If there are 1500 Green Party voters and 9000 Blue Party voters, what is the ratio of Green to Blue in simplest form?

Back

The ratio is 1:6.

Front

What is the ratio of males to females in a class of 42 students if the ratio is 2:4?

Back

There are 14 females.

Front

How do you find the total number of parts in a ratio?

Back

Add the numbers in the ratio together.

Front

If a recipe for 12 cupcakes requires 300g of flour, how much flour is needed for 17 cupcakes?

Back

425g of flour is needed.

Front

What does it mean if a ratio is expressed as 5:7?

Back

It means for every 5 parts of the first quantity, there are 7 parts of the second quantity.