Finding Percentages.

Profits are up by 97%

Percentages and fractions.

You should know that :

(1) 50% = 1/2

(2) 25% = 1/4

(3) 75% = 3/4

(4) 10% = 1/10

(5) 20% = 1/5

Percentage Calculations.

Calculate the following using the simple fractions equivalents to help you:

(1) 50% of 300 days.

(2) 25% of 48 people.

(3) 75% of 28 cats.

(4) 20% of 45 dogs.

(5) 10% of 240 stars.

(6) 30% of 750 boys.

Find 10%then times By 3.

150 days.

12 people.

21 cats.

9 dogs.

24 stars.

225 boys.

Calculating Any Percentage.

We can calculate any percentage by knowing how to calculate the percentages below:

(1) 50% Rule : Divide by 2.

(2) 25% Rule : Divide by 4.

(3) 10% Rule : Divide by 10.

(4) 1% Rule : Divide by 100.

Harder Percentage Calculations.

(1) Calculate 42% of £270

Find:

10% of £270 = Divide by 10.£27

10% of £270 = £27

10% of £270 = £27

10% of £270 = £271% of £270 = Divide by 100.£2.70

1% of £270 = £2.70

42% of £270 = Add up all the numbers above.£113.40

(2) Calculate 87% of 560 people.

Find :

50% of 560 people = Divide by 2.280

25% of 560 people = ½ of 50%140

10% of 560 people = Divide by 10.56

1% of 560 people = Divide by 100.5.6

1% of 560 people = 5.6

87 % of 560 people = Add up all the numbers.

487.2

What Goes In The Box ?

Calculate the following percentages:

(1) 26% of 400 people.

(2) 65% 0f £2800.

(3) 96% of 1200 days.

(4) 39% of 2400 houses.

104

1820

1152

936