We can see that Dylan worked 10.5 hours more in February than he did in January – this is his increase. To tackle this problem first we calculate the difference in hours between the new and old numbers. In January Dylan worked a total of 35 hours, in February he worked 45.5 hours – by what percentage did Dylan’s working hours increase in February? Whether you want to brush up on your basics, or help your children with their learning, this is the book for you.Įxamples - Percentage Increase and Decrease This four-part guide takes you through the basics of numeracy from arithmetic to algebra, with stops in between at fractions, decimals, geometry and statistics. If you wish to calculate the percentage increase or decrease of several numbers then we recommend using the first formula. Positive values indicate a percentage increase whereas negative values indicate percentage decrease. If your answer is a negative number, then this is a percentage increase. % Decrease = Decrease ÷ Original Number × 100 Then: divide the decrease by the original number and multiply the answer by 100. To calculate percentage decrease:įirst: work out the difference (decrease) between the two numbers you are comparing. If your answer is a negative number, then this is a percentage decrease. % increase = Increase ÷ Original Number × 100. Then: divide the increase by the original number and multiply the answer by 100. To calculate the percentage increase:įirst: work out the difference (increase) between the two numbers you are comparing. For more general percentage calculations see our page Percentage Calculators.
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