Making Percentages.

19 x 10025

So 76% of pupils love maths .

Dream

on !!

Testing Times.

John achieves the following grades in his exams:

Maths 2740

English 4765

Science 5486

History 3655

Write down in order what you think is John’s best to work subject.

The problem is because the totals are all out of different amounts we can’t compare the subjects very easily.

What can we do ?

Turn all the grades into a percentage out of a hundred.

Marks As Percentages.

Look at the grades again:

Maths 2740

English 4765

Science 5486

History 3655

To change the maths score into a percentage we multiply by 1001

2740

x 1001 =

27 x 100

40 x 1= 2700

40= 67.5%

We now know John gained 67.5% for maths.

Now turn the other scores into percentages.

Maths 67.5%

English 72.3%

Science 62.7%

History 65.5%

Now put the subjects in order from best to worst:

English

Maths

History

Science.

By turning different scores into percentages which are always out of a hundred we can compare the scores together accurately.

John

Further Problems.

Solve the problems below:

(1) Express £34 as a percentage of £96

Solution

34

96x

100

1= 3400

96= 35.4%

(2) 67 out of 89 people are men. What percentage are men?

Solution67

89x

100

1= 6700

89= 75.3%

What Goes In The Box ?

(1) Express £67 out of £134 as a percentage.

(2) If 34 out of 66 people buy a newspaper , what percentage is this ?

(3) If 34 out of 189 adults can’t swim what percentage can swim ?

50%

51.5%

82%