All questions on Maths

Percentages

i understand how to take 5% 10%, 20%,30% of a number but im really confused by percentages like 28% and 4.3 %

Emma

Answers

The percentages that most people can do easily are things like 100 % or 50% or 10%. People know that 50% is the same as 1/2 and 10% means the same as 1/10. If you really understand percentages though it is easy to convert any percentage into a fraction. Look at the percentage symbol: %. Hidden in the symbol you can find the digits of the number 100 and that is a big clue; a percentage is just another way of saying how many hundredths of something. To take one of your examples let's look at 28% and call it 28/100. I don't know if you are happy with decimal fractions but 28% can be written as 0.28 and that is the kind of fraction that is useful on a calculator. If you want to find 28% of something just multiply it by 0.28 so there you are. Hope that I have helped?

chris_davies

22 March 2013

thank you!

tutor4me

22 March 2013

Yes, some percentages are very simple and people tend to know that 50% is a half and 10 is a tenth. If you really understand percentages then it is easy to convert any percentage into a fraction. Have a look at the percentage symbol: %. You can see that hidden in the symbol there are the digits of the number 100. A percentage is just another way of saying how many hundredths of something. Let us look at one of the examples you gave. 28% is the same as 28/100. I don't know if you are happy with decimal fractions but they are the fractions that are easy to use on a calculator. 28% is the same as 0.28. If you wanted to work out 28% of a number, just multiply it by 0.28 and it is really as simple as that. Hope that I have helped?

chris_davies

22 March 2013

Now have a think about your other example of 4.3% and see if what I have given you helps with that.

chris_davies

22 March 2013

so it would be something divided by 100 x 4.3?

tutor4me

22 March 2013

Yes, you could divide by 100 and then multiply by 4.3 or you could say just multiply by 0.043.

chris_davies

22 March 2013

oh right i understand now thanks!

tutor4me

22 March 2013

Thank you.

chris_davies

23 March 2013

Hi good evening

Brenda

30 November 2025

Hi Brenda! Thanks for your comment! Hope that you've found this resource useful. Best of luck with your learning :)

Vanessa

02 December 2025

Add an answer

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percentage grid

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Hi, I'm revising for my gcse exam in June and struggling with these two topics.

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How to Find 1 Percent of a Number

Introduction

Have you ever seen a 5% discount in a shop or needed to calculate a 15% tip? All percentage calculations, no matter how complex, are built on one simple, core skill: finding 1 percent.

The word "percent" literally means "per hundred." So, 1% is simply one part out of one hundred.

Once you know how to find 1% of a number, you can easily find any other percentage.

To find 5%, you just find 1% and multiply it by 5.
To find 20%, you find 1% and multiply it by 20.
To find 72%, you find 1% and multiply it by 72.

This guide will show you the one simple trick to find 1% of any number instantly.

The Key Method: Finding 1%

Because 1% means "one out of one hundred" (£1/100£), finding 1% of a number is the same as dividing that number by 100.

The fastest way to divide any number by 100 is to move the decimal point two places to the left.

That's the entire trick.

Worked Example 1: A simple number

Find 1% of 300.

The number is 300. The decimal point is at the end: 300.
Move the decimal two places to the left: 3.00
Answer: 1% of 300 is 3.

Worked Example 2: A number with no zeros

Find 1% of 189.

The number is 189. The decimal point is at the end: 189.
Move the decimal two places to the left: 1.89
Answer: 1% of 189 is 1.89.

Worked Example 3: A number that already has a decimal

Find 1% of 84.5.

The number is 84.5.
Move the decimal two places to the left: 0.845
Answer: 1% of 84.5 is 0.845.

Worked Example 4: A very small decimal number

Find 1% of 0.7.

The number is 0.7.
Move the decimal two places to the left. We need to add zeros for the empty spaces: 0.007
Answer: 1% of 0.7 is 0.007.

Practice Questions & Solutions

Score:

Find 1% of 500.

Solution

To find 1% of 500, we move the decimal point two places to the left.

500. becomes 5.00

Answer: 5

Find 1% of 900.

Solution

To find 1% of 900, we move the decimal point two places to the left.

900. becomes 9.00

Answer: 9

Find 1% of 250.

Solution

o find 1% of 250, we move the decimal point two places to the left.

250. becomes 2.50

Answer: 2.5

Find 1% of 476.

Solution

To find 1% of 476, we move the decimal point two places to the left.

476. becomes 4.76

Answer: 4.76

Find 1% of 81.

Solution

To find 1% of 81, we move the decimal point two places to the left.

81. becomes 0.81

Answer: 0.81

A t-shirt costs £40. How much is 1% of its price?

Solution

To find 1% of £40, we move the decimal point two places to the left.

40. becomes 0.40

Answer: £0.40 (or 40p)

Find 1% of 15,200.

Solution

To find 1% of 15,200, we move the decimal point two places to the left.

15200. becomes 152.00

Answer: 152

Find 1% of 70.5.

Solution

To find 1% of 70.5, we move the decimal point two places to the left.

70.5 becomes 0.705

Answer: 0.705

Find 1% of 1.25.

Solution

To find 1% of 1.25, we move the decimal point two places to the left.

1.25 becomes 0.0125

Answer: 0.0125

A bank offers a 1% annual interest rate. If you deposit £5.50, how much interest would you earn in a year?

Solution

We need to find 1% of 5.50. We move the decimal point two places to the left.

5.50 becomes 0.0550

Answer: £0.055

Gianpiero Placidi