Percentages 3
Find the question about cell phones!

Percentages 3

This Math quiz is called 'Percentages 3' and it has been written by teachers to help you if you are studying the subject at elementary school. Playing educational quizzes is an enjoyable way to learn if you are in the 3rd, 4th or 5th grade - aged 8 to 11.

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Don't forget, per cent means per hundred, e.g. 10% = 10100. Suppose you were asked to find 10% of 50, how would you do it? This is how you would do it: 10100 × 50 = (10 × 50) ÷ 100 = 5. It's as simple as that!

There are various ways to write numbers such as decimals, fractions or percentages. If I picked a bunch of flowers from the garden with 9 purple flowers and 3 yellow, what percentage of yellow flowers do I have? 3 out of 12 is one-quarter which can be written as either 0.25, 14 or 25%.

1.
What is 20% of 20% of 500?
100
20
200
2
20% of 500 = 20100 × 500 = (20 × 500) ÷ 100 = 100 AND 20% of 100 = 20100 × 100 = (20 × 100) ÷ 100 = 20. NOTE: 20% of 20% is NOT equal to 40%. The word 'OF' means multiply!
2.
What is 62.5% of 12?
75
7.5
0.75
0.075
62.5% of 12 = 62.5100 × 12 = (62.5 × 12) ÷ 100 = 7.5
3.
What is 60% of 250?
0.15
1.5
150
15
60% of 250 = 60100 × 250 = (60 × 250) ÷ 100 = 150. DON'T forget: when you divide by 100, move the decimal point two places to the left
4.
If 70% of the population of a country of 60,000,000 have cell phones, what percentage don't have cell phones?
42%
30%
18%
60%
100% - 70% = 30%. The sum of the various percentages MUST add to 100%
5.
What is 5.5% of 100?
5.5
55
0.55
0.055
5.5% of 100 = 5.5100 × 100 = (5.5 × 100) ÷ 100 = 5.5. You shouldn't have had to calculate anything in this question because X% of 100 = X for all values of X
6.
If John loses 25% of £900, how much does he lose?
£0.225
£2.25
£22.50
£225.00
25% of £90 = 25100 × 900 = (25 × 900) ÷ 100 = £225
7.
Henry is paid £42,400 per annum (per year). If he gets a 3.4% pay increase, how much will he earn now per annum?
£43,841.60
£42,841.60
£40,958.40
£1,441.60
3.4% of £42,400 = 3.4100 × 42,400 = (3.4 × 42,400) ÷ 100 = £1,441.60 BUT this is only the interest. He will now earn £42,400 + £1,441.60 = £43,841.60
8.
What is 40% of 18?
0.0072
0.72
72
7.2
40% of 18 = 40100 × 18 = (40 × 18) ÷ 100 = 7.2
9.
What is 25% of 75?
0.1875
1.875
187.5
18.75
25% of 75 = 25100 × 75 = (25 × 75) ÷ 100 = 18.75. DON'T forget: when you divide by 100, move the decimal point two places to the left
10.
Peter will earn 3.2% interest on £12,500. How much money will he earn in interest?
£40.00
£4.00
£400
£4,000
3.2% of £12,500 = 3.2100 × 12,500 = (3.2 × 12,500) ÷ 100 = £400
Author:  Frank Evans

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