GCSE Maths - Whole to Part Ratios #85

The video tutorial explains how to solve ratio problems using examples of cats and beads. It starts with a scenario involving blue and green cats, where the ratio of blue cats to total cats is given. The tutorial demonstrates how to calculate the number of green cats based on the ratio. It then presents another example with orange and purple beads, showing how to determine the number of purple beads when the ratio of orange beads to total beads is known. The video emphasizes understanding and scaling ratios to find unknown quantities.

If the ratio of blue cats to total cats is 3 to 7, and there are 12 blue cats, how many total cats are there?

• 24

• 16

• 28

• 21

In the example of blue and green cats, what is the ratio of blue cats to green cats?

• 3 to 7

• 3 to 4

• 4 to 3

• 7 to 3

If Charlie has 12 blue cats, how many green cats does she have?

• 12

• 24

• 16

• 20

What is the ratio of orange beads to purple beads if the ratio of orange beads to total beads is 4 to 9?

• 5 to 4

• 4 to 5

• 4 to 9

• 9 to 4

If there are 28 orange beads, how many purple beads are there?

• 35

• 28

• 20

• 25