You should know what fractions look like/how much they are equal to.
The easiest way to represent a fraction is to draw a pie.
This is the pie I used to help me answer these questions. It's divided into eighths.
For B you'll have to convert your fraction into percent. You can do this 2 ways [for both you'll either have to divide or multiply, and whatever you do to the top you MUST do it to the bottom/vice versa]:
The first way to do this is take the denominator and try to make it into 100 [multiply it by whatever number will make it into a 100, or divide if the denominator is more than 100]. Again, what you do to the top you must to the bottom [vice versa]! if you do this correctly, you then take the numerator and add a percent sign to it [ex: 10%]. Show your work!
The second way to do this if your denominator cannot be multiplied or divided evenly is to first convert it into a decimal [see How to do C] after that you multiply the denominator by 100 [percents are always out of 100], then the numerator by 100 and you will get your answer [which may have since you couldn't multiply/divide it evenly]. Take the numerator add a percent sign to it. Show your work!
For C you'll have to convert your fraction into a decimal. There is one way to do this. Remember, what you do to the top you do to the bottom! always! it's a MUST! [vice versa].
All you have to do is take your denominator and divide it by itself [ex: if the denominator is an 8 then you must divide it by 8]. You should get a 1 and always a 1 [decimals are always out of 1!]. 'What you do to the top you must do it to the bottom [vice versa]' divide the numerator by it's denominator! [ex: The denominator is 8 and the numerator is 3. So you divide 3 by 8.]. There, now you have your decimal! [ex: 0.375 over 1].