I hope the examples above give you an insight into how to remember percentage calculations – a whole is 100% – an amount of that can be expressed as a fraction – calculate the fraction as a decimal and multiply by 100 to show the percentage amount.įor more information and to see how this method works you can enter your own figures into the percentage decrease calculator.In this example, the goal is to decrease the prices shown in column C by the percentages shown in column D. You had a 25% decrease in your pea harvest – bad news! Multiply this by 100 to show it as a percentage. Now we can express the result as a fraction of the old amount – the fraction is three over twelve – from here we can calculate it as a decimal figure. If you harvested 12KG of peas last year but only 9KG of peas this year you can work out the decrease by subtracting the new value from the old value. This is the same as how you work out a percentage increase – you find the difference between your original number and the new number and then work out what percentage this is of the original number. If you want to check your calculations and see more details visit the percentage increase calculator. You had a 20% increase in your potato crop! Now show the decimal as a percentage by multiplying it by 100. As a fraction this is five over twenty-five, we can then calculate it is a decimal. Now we can work out what percentage this was of the original amount. Start by finding the difference – subtract the lower value from the higher value. If you grow potatoes in your garden and last year you harvested 25KG but this year you harvest 30KG we can work this out as a percentage increase. The first calculation you need to make is to work out what the increase is – once you have the value of the increase you can calculate what percentage that amount is of the initial amount – this is the percentage increase. To work out a percentage increase is slightly more complex as you need to make two calculations. This calculator is on our homepage too! Work out a percentage increase If you divide five by five the answer is 1 – a whole – multiply this by 100 and you have the percentage amount – 100%. If you have a pie and slice it into five portions, each portion is a fifth of the pie and the whole pie is five fifths.įive fifths as a fraction is five over five. To express this as a percentage you multiply it by 100 – 0.20 x 100 = 20%Īgain, think of a whole and how that is 100%. ![]() To show this as a decimal you just divide the top number by the bottom number. Let’s think about this a bit more and show you another way to remember it – fractions!Ī fraction is a portion – one fifth, expressed as a fraction is one over five. If you wanted to work out what percentage 36 is of 240 you just divide the percentage amount by the total amount and then multiply it by 100. From there you can use the principle of a whole being 100% to show it as a percentage. Calculating what percentage one number is of another numberįor this calculation you want to know what proportion the number that you want to express as a percentage is of the whole amount. ![]() We have a calculator for this on our homepage. If 1% of 1,367 is 13.67 you can multiply it by 15 to find 15%. If you want to find 15% of 1,367 start by working out 1%, move the decimal places one point to the right: One percent is one hundredth of the full amount – so all you need to do is to move the decimal point of the whole two places to the right. To find what one percent of a number all you need to remember is that percentages work around the fact that a whole is 100%. Once you know what one percent is, the rest is easy! To work out what a certain percentage of a number is I find it best to work out what one percent would be and then just multiply the number of percent you want to find by that number. This site has a calculator specifically for each of these types of percentage (you’ll find links to them in the menu) and each page details the calculation to show you how to work out the percentage – but here’s a quick guide on each. Calculating what percentage one number is of another number.Calculating a certain percentage of a value.There are various ways to work out percentages – but the main starting point should always be, what sort of percentage are you looking to calculate? The main ones are:
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