SOLUTION: If x is 250 percent of y, then what percent of x is 2y? A. 25% B. 40% C. 60% D. 75% E. 80%

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Question 252237: If x is 250 percent of y, then what percent of x is 2y?
A. 25% B. 40% C. 60% D. 75% E. 80%
Found 2 solutions by Theo, nerdybill:
Answer by Theo(13342) (Show Source):
You can put this solution on YOUR website!
x is 250 percent of y means that x = 2.5*y

so we start with x = 2.5y.

if we solve for y, we get:

y = x/2.5

if we multiply y by 2, then we get:

y = 2*(x/2.5)

this means that y = x/1.25.

this is the same as y = (1/1.25)*x

1/1.25 = .8 which would make y = .8*x.

.8 * 100% = 80%.

your answer would be selection e (80%).

example:

let x = 25 and let y = 10.

x/y = 25/10 = 2.5 * 100% = 250%

multiply y by 2 to get:

y = 20

y/x = 20/25 = 4/5 = .8 * 100% = 80%

Answer by nerdybill(7384) (Show Source):
You can put this solution on YOUR website!
If x is 250 percent of y, then what percent of x is 2y?
A. 25% B. 40% C. 60% D. 75% E. 80%
.
Since:
x is 250 percent of y
we have
x = 2.50y
Solving for y:
y = x/2.50
.
2y then would be:
2y = 2x/2.50
2y = x/1.25
2y = 0.8x
answer: E. 80%