![]() Half of 600 is 300 and then half of 300 is 150. We can divide by 4 by halving and halving again. Here is another example of using the rules of finding simple percentages. The following table shows the rules used to find basic percentages of amounts:įor example, to find 50% of a number, simply divide it by 2. Some percentages are easier to find and can be worked out mentally. The formula of Number × Percentage ÷ 100 = Answer is a good way to find a percentage of an amount when a calculator is available and the numbers involved are larger or contain decimals. The formula to find a percentage of an amount is Number × Percentage ÷ 100 = Answer. The formula can still be used in the same way. Here is another example of finding a percentage of an amount using the formula.Įven though the percentage is larger than 100, the rule still applies. The number is 64.6, the percentage required is 48. The formula to calculate the percentage of a number is Number × Percentage ÷ 100 = Answer. ![]() This is because most percentage calculations involve performing a multiplication that is not easy to do without writing down working out.įormula to Calculate a Percentage of a Number The easiest way to find a percentage of a number is to use a calculator. We do not need to divide by 100 if we have used the % button on the calculator because the % sign does this for us. Therefore 34.7% of 125 = 43.375.Īlternatively, if your calculator has a % button, then we type the following:ģ4.7% × 125 = 43.375. Here is an example of finding percentages with a calculator. If there is no % key on the calculator, multiply the percentage value and the number together but then divide by 100. If your calculator has a % key, simply type the percentage followed by the % key and multiply this by the number. How to Calculate a Percentage with a Calculator This method of finding percentages is best done on a calculator. To find a percentage of a number, multiply the percentage by the number and then divide by 100. Here is an example of calculating 19% of 55. ![]() So to find a percentage of a number, we multiply them and also divide by 100. In maths, the word ‘of’ means to multiply. This is because ‘per’ means divide and ‘cent’ means 100. The word ‘percent’ means to divide by 100. For example, to find 31% of 94, multiply 94 by 31 and then divide by 100. Do not write a percentage sign in your answer. To calculate a percentage of a number, multiply the number by the percentage and then divide by 100.
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