You are Here: Home >< Maths

# Maths help watch

1. Two variables are connected by the relation: A∝1/B2.
B is increased by 40%.
Describe the change in A in percentage terms.
2. (Original post by Rj2018)
Two variables are connected by the relation: A∝1/B2.
B is increased by 40%.
Describe the change in A in percentage terms.
Anybody?
3. wow you waited 3 minutes before posting "Anybody", such impatience.
4. (Original post by wiseguy99)
wow you waited 3 minutes before posting "Anybody", such impatience.
It really is ngl
5. Gonna try again, anyone???
6. (Original post by Rj2018)
Two variables are connected by the relation: A∝1/B2.
B is increased by 40%.
Describe the change in A in percentage terms.
? What's that '2' in your expression?

Anywho, what does it actually mean for A to be proportional to that?
7. (Original post by Rj2018)
Two variables are connected by the relation: A∝1/B2.
B is increased by 40%.
Describe the change in A in percentage terms.

We can rewrite this as:

What is the ratio of the values of when is multiplied by ?
8. (Original post by RogerOxon)

We can rewrite this as:

What is the ratio of the values of when is multiplied by ?
Another way to look at this is:

What is the ratio of the values of when is multiplied by (i.e. increased by 40%)?
9. .im gonna go ahead and say a is increased by 20% because idk it's just me saying random stuff don't dig at me 🤤
10. (Original post by who cares lmao)
.im gonna go ahead and say a is increased by 20% because idk it's just me saying random stuff don't dig at me 🤤
Well why say it at all then lol, that's not helpful to OP.
11. (Original post by who cares lmao)
.im gonna go ahead and say a is increased by 20% because idk it's just me saying random stuff don't dig at me 🤤
12. Thanks for all your help guys! Finally got it. It was 49% decrease!

### Related university courses

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: October 27, 2017
Today on TSR

### Results day under a month away

How are you feeling?

Poll
Useful resources

### Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams