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Percentage isn’t necessarily something we need to know how to calculate in the 21st century, with the advent of technology making most formulae unnecessary. But while technology is all too easy to access, people need to know where to start when it comes to percentages. They first have to come up with a base, something which only takes about five minutes to learn.
How to calculate percentage
At its base, percentage is simply calculating how much a sum is out of 100.
Translated, the words “per” and “cent” translate into “per 100”.
So, a sum of five per 100 is five per cent, and all percentages must start from either a fraction or decimal.
The decimal format provides a simpler avenue for calculating a percentage, as it only requires multiplication by 100.
If people use .70 as a starting point, they times it by line hundred to arrive at 70 percent.
When it comes to fractions, the process complicates slightly.
People need to break out some of their primary school arithmetic to calculate percentage from a fraction.
To calculate this, take the numerator (top) of the fraction and use it to divide the denominator (bottom).
If a fraction is 10/100, 100 divided by 10 is 10, making the percentage 10 percent.
Calculating percentage is most useful when it comes to monetary matters, such as working out tax.
In this case, people have to work backwards with a percentage, such as knowing 25 percent of their income goes to the Government.
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The first step is dividing the given percentage by 100, so working back with a sum of 25 would give .25.
To work out the total amount which goes to tax, times the monthly paycheque by the decimal.
For example, say someone gets £1,200 per month, but 25 percent goes to tax, .25 x 1,200 equals 300.
So, the person, in this case, pays £300 per month in taxation from their paycheque.
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