The Student Room Group
Competition - post a photo you've taken of nature >>
Competition - post a photo you've taken of nature >>
Competition - post a photo you've taken of nature >>

Percentage Problem

Hi,

I'm doing maths revision right now, and I've been hopelessly trying to figure out a question for the past hour, can somebody please explain how it is done to me?

The question is:

A farmer found that when his cow listened to classical music the milk it produced increased by 3%.
This increase of 3% represented 0.72 litres of milk.

Calculate the amount of milk produced by the cow when it listen to classical music.


Any Help, much appreciated. :smile:
ok so you know what the value of 3% is.

What is the value of (100+3)%?

Does that help at all?! :smile:
Reply 2
Avatar for Alexa08
Alexa08
I Have No Imagination
Hi,

I'm doing maths revision right now, and I've been hopelessly trying to figure out a question for the past hour, can somebody please explain how it is done to me?

The question is:

A farmer found that when his cow listened to classical music the milk it produced increased by 3%.
This increase of 3% represented 0.72 litres of milk.

Calculate the amount of milk produced by the cow when it listen to classical music.


Any Help, much appreciated. :smile:


So if 3% represents 0.72 l ... then 1% represents (0.72/3) = 0.24l per 1%... So in total 0.24 x 100 = 24.0 litres.

Hope that helps.
Alexa08
So if 3% represents 0.72 l ... then 1% represents (0.72/3) = 0.24l per 1%... So in total 0.24 x 100 = 24.0 litres.

Hope that helps.


Oh okay, so then I'd have to add 3% and 100% to get 24.72 litres?
Woo! You did it!
Reply 5
Avatar for Alexa08
Alexa08
Yeah I think so.
candle_light
Woo! You did it!



Yay. :biggrin:
Thank you.
Reply 7
Avatar for Bateman
Bateman
17
Well done you did it.
But what if the question read

The cows produced 3% more than they would have without the classical music

how much do they produce without the classical music?

Basically, it's the same again, you have to find 1%

the 0.72 litres is 103%, so devide 0.72 by 103, thats 1% then multiply by 100
Does anyone have the paper this was on?

Quick Reply

Related discussions

Latest

Trending

Trending

Articles for you