Easy Maths Questions (1 Viewer)

[girlworld_club]

John bought an ipod for $431 at 40% off. What was the original price of the ipod.

(Please show full working)

 

[Timothy6340]

431 x 140%= $603.4

 

[bleakarcher]

John bought an ipod for $431 at 40% off. What was the original price of the ipod.

(Please show full working)

I'm going to assume that is the price after the discount.
Let the original price of the ipod be x.
0.6*x=431
so x=431/0.6=$718.33

 

[Carrotsticks]

John bought an ipod for $431 at 40% off. What was the original price of the ipod.

(Please show full working)

 

[girlworld_club]

why did you get 6/10 for the original price? I don't get it?

 

[Carrotsticks]

why did you get 6/10 for the original price? I don't get it?

Because if I have something original price, I pay 100%.

If I have 40% off, I am paying only 60% original price.

60% is the same thing as 6/10.

So I am paying 6/10 of the original price, hence 6x/10.

 

[girlworld_club]

hmmm...would it be wrong to write 60/100?

Thanks! for that explanation, makes sense.

 

[Carrotsticks]

hmmm...would it be wrong to write 60/100?

Thanks! for that explanation, makes sense.

60/100 isn't wrong, but you don't want to over complicate things unnecessarily.

Remember that 60/100 is the same as 6/10 so best to simplify it.

You could simplify further by writing 6/10 as 3/5.

 

[qwerty44]

hmmm...would it be wrong to write 60/100?

Thanks! for that explanation, makes sense.

His working is just saying that 60% of a number (x) is 431. So 60%, 6/10, 60/100, 60/1000, 0.6 .....all the same thing.