Doug's income is 40% of marko's income

Question

Doug's income is 40% of Marko's income and Jon's income is 50% of Doug's income.If Doug's income is $28000 a year,then Marko's income is what percent of Jons's income

A)5%
B)14%
C)20%
D)175%
E)500%

Bunuel · Answer

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RR88 · Answer

Option E

D = 0.4M
J = 0.5D

M/J = ?

J = 0.5*0.4M = 0.2M
M/J = 1/0.2 = 5 or 500%

pushpitkc · Answer

Since, Marko's income is the highest, let it be 100
Given information, Doug's income is 40% of Marko's income. Hence the income is 40
Since, Jon's income is 50% of Doug's income, the income is 20

The incomes are in the ratio
20:40:100 or 1:2:5

Since we have been asked to find Marko's income is what percent of Jons's incomee 
it will be 5/1*100 or 500%(Option E)

generis · Answer

Because answers were far apart and numbers were reasonable, I did it the long way, albeit with some shortcuts. Round up Doug's income and drop 3 zeros for everyone.

Round up, so Doug = 30.

Jon is 50% or half of Doug = 15

Marko? Doug = .40 of Marko =>

30 =  \frac{4}{10}  or  \frac{2}{5}   M

Multiply both sides by  \frac{5}{2}

\frac{5}{2} * 30 = (  \frac{5}{2}  *  \frac{2}{5} ) M

M = 75

Marko as a percentage of Jon?
 
 \frac{75}{15}  =  \frac{5}{1}  =  \frac{x}{100}  ==> 500%

ScottTargetTestPrep · Answer

We are given that Doug’s income is $28,000. We can create the following equations in which j = Jon’s income and m = Marko’s income:

28,000 = 0.4m

70,000 = m

AND

j = 0.5(28,000)

j = 14,000

Marko’s income, expressed as a percentage of Jon’s income, is 70,000/14,000 = 5 = 500%

Answer: E

Abhishek009 · Answer

40% of M = D

So, 40M/100 = 28000

Or, M = 70000

J = 50% D

So, J = 14000

SO, M/J 's income = 70000/14000*100

Thus, Answer must be (E) 500%

Doug's income is 40% of marko's income

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Doug's income is 40% of marko's income

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