Dec

2013

## Forced To Write A Percentage Blog Post :P

A percentage is something you learn in math class. You use a sign called “Percentage Sign” which is ‘%’. It is out of 100. You can see how much of something is in something. For example, 50% is half of something. This means 50 % of 8 is 4 becasue 100/50=2 and 8×1/2 is 4. 25% os a quarter of something because 100 divide by 25 is 4. If you want to find out 25% of 40, you need to 40/4 or 40×25/100. It will equal 10 in both ways. Now, I will tell you how to find out the percentage of something. For example, there are 50 marbles in a bag. There are 5 red marbles. What is the percentage of picking a red marble from the bag? To work out-

First of all, you need to make the numerator what you want to find out, and the denominator the total amount. Then you divide it. In this case, the numerator was 5 and the denominator was 50. Then the answer was 1/10 (0.1). Then you times the answer by 100. Finally, the answer will come out. In this example it was 0.1×100 which equals 10. Also, you can divide the denominator with the numerator first. Which is 50/5=10. Then you can just divide 10 by 100 and then that will equal the percentage which is 10%.

Another example is there are 48 markers in the jar. There are 8 green markers in the jar. What is the percentage of picking a green marker out of the jar? To work out-

In this case, the numerator is 8 and the denominator is 48 because we want to know the percentage of taking out 8 green markers from a jar with 48 markers. Then, you divide 8 from 48. This equals 1/6 (0.16666(0.17)). Then you multiply 100 to 0.16666. It will then equal 16.666. If you want to round it up to the second power point, it will be 16.67 because 6 is bigger than 5 so you make the digit on the second power 1 higher. If you want to make it the first power, it will be 16.7 because same as the second power, 6 is higher than 5. If you want to round it up to a whole number, it will be 17% because then, .7 or .67 or .666 is bigger than .500.

The most important thing you need to be careful is that to not make the denominator and numerator opposite because if you make it opposite, you can’t find your percentage. However, if you made that mistake, you still can see if you made it the opposite or not. E.g.:

If you want to find out the percentage of the shaded part, of this, you can see it’s not 100% because 100% is everything and in this one, only 1/3 of the shape is shaded.