Question

How to math with Crispy Rat
Percentages

Answer 1

Now let's get the basics out of the way, what is a percentage? A percent is one unit for every one hundred. This essentially means that 1 percent is \(\dfrac{1}{100}\) or \(0.01\) or that 19 percent is \(\dfrac{19}{100}\) or \(0.19\).

Answer 2

Now what about converting fractions into percent form? Well there are two ways. Lets go over them!
First: Converting the percentage to \(\dfrac{x}{100}\). Since one percent is 1/100 that means that if you convert a fraction into a multiple \(\dfrac{1}{100}\) you get a percent.
For example: To convert \(\dfrac{4}{5}\) into a percent we have to multiply the top and bottom by \(20\) because \(20\)*\(5\)=\(100\). That means that \(\dfrac{4*20}{5*20}\)= \(\dfrac{80}{100}\). Then since one percent is \(\dfrac{1}{100}\) and since their is 80 of \(\dfrac{1}{100}\) because \(\dfrac{1*80}{100}\)=\(\dfrac{80}{100}\) meaning that \(dfrac{4}{5}\)=80%.
Next: Using division and multiplying the decimal by 100.
For example: To convert \(\dfrac{4}{5}\) into a percent we divide 4 over 5. If we plug that into a calculator we get \(0.8\). Then we multiply it by 100 and get \(0.8\)* \(100\)=\(80\), thus giving us the same answer as before \(\dfrac{4}{5}\) is equal \(80%\)

Answer 3

Another thing regarding percent is finding what percent of x is y. This is quite easy as you would have the number used to find the percent dividing the number you want to find the percent of.
For example: What percent of \(20\) is \(5\). \(5\) is the number that is being used to find the percent and \(20\) is the number you want to find the percent of. So \(\dfrac{5}{20}\)= \(\dfrac{1}{4}\) and using the methods above we get that \(5\) is \(25%\)

Answer 4

What about questions that ask what number is x percent of y. To do this you set up an equation \(y\)*\(\dfrac{x}{100}\)= the~answer.
For example what is 10 percent of 50.

So y=50 and x=\(10\). This means that \(50\)*\(\dfrac{10}{100}\)=\(\dfrac{500}{100}\)=\(5\).

Percentages increase and decrease like so when a number decreases it is \(x-(insert~ number)%*x\) and when you want to increase you would do \(x+(insert~number)%*x\).
For example: What is the number 10 after increasing by 60%. \(10+(60)%*10\)=\(10+(60/100)*10\)=\(10+(600/100)\)=\(10+(600/100)\)=\(16\).

Answer 5

Multiplying percentages are the same as decimals(Remember 0.01 or 1/100 is 1 percent) numbers except you multiply it by x at the end.
For example: \(30%\) of \(40%\) of \(40\). Can be translated as \(0.3\) * \(0.4\) * \(40\)=\(0.12\)*\(40\)=\(4.8\).

Answer 6

ALL PAST TUTORIALS!
https://questioncove.com/study#/updates/60a9bd6dc5af2b55ec58500<--coordinates
All my past tutorials!
https://questioncove.com/study#/updates/608f73452035c39be5ecfa0 fractions
https://questioncove.com/study#/updates/608dbe8b5b828f43d548ec00 Equations part 1
https://questioncove.com/study#/updates/608f22bc9365c25ed592c00 equations with substitution
https://questioncove.com/study#/updates/6094a4d93c88ddaa04563800
A guide to sqrt and cbrt

Answer 7

I apologize for any latex mistakes lol

Answer 8

Nice job! I have linked this in my masterpost! :)

Answer 9

love that title "how to math" XD

Answer 10

Thank you for making this! I will totally be using this soon.

Answer 11

i should make a tutorial

Answer 12

This deserves more attention, great job on your post, crispyrat!

Answer 13

Damn thanks, I never knew how to math, this really helped 🤠🤠

Answer 14

Thank you for this, Great job explaining! you did awesome. *thx again*

Answer 15

that was on purpose smh

Answer 16

Thanks! it helped.

Answer 17

i still dont understand!

Answer 18

Wow thank you

Answer 19

all im seeing is numbers and non of it makes since to me

Answer 20

oh there are words? https://www.mathsisfun.com/percentage.html<--maybe will help

Answer 21

ohhh thank you