How do you work out percentages?
To calculate the percentage increase: First: work out the difference (increase) between the two numbers you are comparing. Increase = New Number - Original Number Then: divide the increase by the original number and multiply the answer by 100. % increase = Increase ÷ Original Number × 100. If your answer is a negative number then this is a percentage decrease. To calculate percentage decrease: First: work out the difference (decrease) between the two numbers you are comparing. Decrease = Original Number - New Number Then: divide the decrease by the original number and multiply the answer by 100. % Decrease = Decrease ÷ Original Number × 100 If your answer is a negative number then this is a percentage increase.
Divide by 100, then multiply by the percentage. Let me give you an example. What is 30% of 1000? First, you do 1000/100 which gives you 10. Then you do 10 x 30 which gives you 300. So, 30% of 1000 is 300 :)
It can be either done by dividing the two numbers in question and then multiplying by 100 so that you go from a decimal answer to a percentage one. Or you can create a fraction with your two numbers (a/b) and search for equivalent fractions that are easy to convert into percentages such as those with denominator 4,8,10,100 etc.
Divide the smaller number by the bigger number, then times by 100 E.g. if I wanted to find out 3 as a percentage of 50 I'd do: 3 / 50 = 0.06 0.06 x 100 = 6 Therefore 3 is 6% of 50. Hope that helps!
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