# Maths help: £20 reduced by 15%?

im really rubbish at maths and the question says:

The normal price of cat basket is £20

In a sale, the cat basket is reduced by 15%

Work out the sale price of the cat basket

Its probably simple, but i dont even know where to start!

Thankyou!:-)

Relevance

Two ways of working it out:

First, Basket is £20 sale price is 15% off so which can be expressed as 0.15 so 20 x 0.15 = 3 so £20 - £3 is £17

Or the more direct way

15% off Leaves 85% which can be expressed as 0.85. £20 x 0.85 = £17

• OK, the first thing that you must do is: find 15% of £20 by multiplying £20 by 15/100, what you get is the amount that the cat basket normal price was reduced by, then you need to subtract that from the normal price i.e £20 - £3 and you will get the sale price of the cat basket.

and the £3 is the answer that you get when multiplying £20 by 15/100

I guess that will help.

• Anonymous
8 years ago

10% of £20 = £2

5% of £20 = £1

so 15% = £3

£20 - £3 = £17 (the sale price of the cat basket)

• this is second querstion recently on easy percentages first of all ignore those who say its £3

£3 is tha amount taken off

ie as some have said

10% is £2

so half that again is another £1 ie 5%

total is 15 per cent off so 2 plus 1 is 3 take that away from £20 and we have £17

for those who end up with answer as £3 you are only half way there and in a sum you would lose out ie be marked wrong

always look at the question

ie if question was

how much is taken off £20 in a 15% sale then yes £3 would be correct but question asks work out the sale price

if youj gave the shop £3 i think you would find yourself beinf arrested for shop lifting

who on earth is the twit who seems to have voted down every correct post

my goodness its scary people voting down when the ansew is 100 per cent correct

• Anonymous
8 years ago

Well, do it this way:

10% of 20 is 2; because you just move the decimal over ---> 20---2.0

5% of 20 is half of what 10% of 20 is. If 10% of 20 is 2, then half of that is 1.

You can also find this by saying "20 *(times) .15; which is 3. So the sale is for 3 dollars off.

• Turn it into a fraction. Since you know 20 is 100% you want to find out what number 15% would be - so x/20 = 15/100. Cross multiply to get 100x =15 X 20. so 100x = 300. Now you want to get X by itself so you divide both sides by 100. X = 300/100. So X = 3

Now you know that 15% of 20 is 3 so you just subtract 3 from 20. The final cost will be £17.

• If the price is reduced by 15% then selling price will be 85% of original price

Therefore sale price is 85% of £20 = 85/100*20= £17

• Anonymous
4 years ago

eleven: Write as a %: .123 = 0.123*a hundred% = 12.3 % 12: Write as a %: 4.15 = 4.15*a hundred% = 415 % 13: Calculate 72% of 40 = 72*40/a hundred = 28.8 14: Calculate 23% of ninety 9 = 23*ninety 9/a hundred = 22.seventy seven 15: A lending employer demands a fifteen% down cost of the acquisition cost of a house. Required down cost for a house costing \$250,000 = \$250000*15% = \$37,500 sixteen: a pair of footwear fees \$40 3.00. they're on sale immediately for 20% off. revenues tax in our state is 6%. complete bill is \$40 3*4/5*106% = \$36.40 six 17: bill and Mandy are finally waiting to purchase their very own residence; they have been renting for see you later! the homestead fees \$a hundred and fifty,000. they are going to be borrowing the money by using a loan employer, yet they should first pay a down-cost of 20%. After their down-cost, they owe on the homestead \$150000*(a hundred--20)% = \$a hundred and twenty,000 18: There are a million,250 contributors of our church. 10% of them are little ones = 1250*10% = one hundred twenty five 19: Write as a discounted fraction: .425 = 425 / one thousand = 17 / 40 20: Write as a discounted fraction: 5.26 = 5 13/50

• I am pretty sure the price would be £17

What you can do to easily understand it is to find the 15% and substract it from the original price.

£20/100 = 0,2 * 15 = 3

20 - 3 = £17

I am not entirely sure this is right. but it should be.

• Reduction by %:

If you're reducing something by 15%, then the new value will be 100%-15%=85% of the original.

So:

1) Take the percentage away from 100:

100-15=85.................................................................(1)

So the new value will be 85% of the original

2)Divide (1) by 100

85/100=0.85..............................................................(2)

3)Multiply the original value by (2):

20x0.85=17

Therefore the new value is £17

Edit:

For what it's worth, if you want to increase by a %, then at step 1) add the percentage to 100 instead subtracting, then follow steps 2) and 3) as normal.