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Percentage Problems

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by

Mr Mattock

on 2 April 2017

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Transcript of Percentage Problems

Percentage Problems
Starter
Start on the left, work your way across doing the calculations in your head, and write down the answer.

START ANSWER

50 >> ÷ 2 , + 10 , ÷ 7 , x 6 , - 6 , ÷ 12 , x 19 , + 7 , ÷ 9 ………….

40 >> ÷ 5 , + 8 , ÷ 2 , x 7 , - 8 , ÷ 12 , x 13 , + 3 , ÷ 11 ………….

30 >> ÷ 6 , + 13 , ÷ 9 , x 8 , - 4 , ÷ 4 , x 15 , + 3 , ÷ 8 ………….

20 >> ÷ 4 , + 20 , ÷ 5 , x 9 , - 3 , ÷ 7 , x 12 , + 3 , ÷ 5 ………….

10 >> ÷ 2 , + 11 , ÷ 8 , x 12 , - 3 , ÷ 3 , x 12 , + 6 , ÷ 9 ………….

Activity
Complete the percentage problems worksheet.
Example
Richard has just hired a new baker for his bakery. In one hour the new employee has burned 55 cookies. If this represented 15% of the cookies produced in a day, work out the number of cookies produced in a day.
L.O. - Solve problems involving percentages.
Example
Richard has just hired a new baker for his bakery. In one hour the new employee has burned 55 cookies. If this represented 15% of the cookies produced in a day, work out the number of cookies produced in a day.
? x 0.15 = 55

55/0.15 = 367 cookies.
Example
A serving of ice cream contains 4200 calories. 1260 of the calories come from fat. Work out the percentage of calories that come from fat.
Example
A serving of ice cream contains 4200 calories. 1260 of the calories come from fat. Work out the percentage of calories that come from fat.
1260/4200 = 0.3

0.3 = 30%
Example
Amy earns £1750 per month. She spends 30% of her salary on rent. Her council tax is 15% of her rent. Work out the amount of council tax she pays per month.
Example
Amy earns £1750 per month. She spends 30% of her salary on rent. Her council tax is 15% of her rent. Work out the amount of council tax she pays per month.
1750 x 0.3 x 0.15 = £78.75
Starter
Start on the left, work your way across doing the calculations in your head, and write down the answer.

START ANSWER

50 >> ÷ 2 , + 10 , ÷ 7 , x 6 , - 6 , ÷ 12 , x 19 , + 7 , ÷ 9 …
5
….

40 >> ÷ 5 , + 8 , ÷ 2 , x 7 , - 8 , ÷ 12 , x 13 , + 3 , ÷ 11 …
5
….

30 >> ÷ 6 , + 13 , ÷ 9 , x 8 , - 4 , ÷ 4 , x 15 , + 3 , ÷ 8 …
6
….

20 >> ÷ 4 , + 20 , ÷ 5 , x 9 , - 3 , ÷ 7 , x 12 , + 3 , ÷ 5 …
15
….

10 >> ÷ 2 , + 11 , ÷ 8 , x 12 , - 3 , ÷ 3 , x 12 , + 6 , ÷ 9 …
10
….

Activity
Complete the percentage problems worksheet.
1) 42 red grapes
2) 2500 cookies
3) $540
4) 14.3%
5) 7.5 quarts
6) 12%
7) 3.25 pounds
8) 6.25 kg
9) 4.425 cm
10) 1440 students
Activities
Activity
Answers

Key
Examples

Worked
Example

Worked
Example

Worked
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Full transcript