Candy X

See More About:    Collage Painting        Bronze Carving        Painting White        

TrustPaypal verification increases the security for Art Canvas users. Verified members have successfully completed PayPal"s Strict Verification system to establish their identity. When you shop for Candy X, you can now do it with confidence.

Frequently Asked Questions...

Simple formula for this type of question?

is there any simple formula for this type of question?

John bought 25% more candy than Mary. He gave 20 candies to Mary, causing her to have 20% more than John. How many candies do they have in total?
How many candies should John gave Mary in order for her to have 25% more than him?


Best Answer...

Answer:

They're called let statements.

Let mary's amount of candy = x
John's amount would then = x + .25x = 1.25x
John's amount after giving her 20 candies = 1.25x - 20
Mary's new amount = x + 20

Now, from what they tell you, Mary's new amount is 20% more than John's amount. To get his amount to equal hers, we just mutiply his new amount by 1.2, representing 120% of his total amount. We can set up an equation representing this, and then solve.

x + 20 = 1.2(1.25x - 20)
x + 20 = 1.5x - 24
44 = .5x
88 = x
So, now we can plug in this value to find out all the values.
mary's amount of candy = 88
John's amount would then = 88 + .25(88) = 1.25(88) = 110
John's amount after giving her 20 candies = 1.25(88) - 20 = 90
Mary's new amount = 88 + 20 =108

The total amount of candy in all is 198.

For mary to have 25% more than John, we can use let statements again.
Let John's amount = x
Mary's amount = 1.25 x
These have to add up to the total 198:
x + 1.25x = 198
2.25x = 198
x = 88

So, for John to go from 90 to 88, he would have to only give her 2 candies to make her have 25% more than him.

So, the total amount is 198 candies. John would need to give mary 2 candies for her to have 25% more candy than him.