# Calculate Percent of Missing Data Based on Existing Data

Hello Experts,
This is a math type of question. If I have a set of data for 100 people that falls into four income brackets, but one of the groups is 'No Income Data', what is the method for calculating (projecting) the income bracket for the 15 people with 'No Data' based on the percent/totals of the 3 groups that do have data. For instance, if I have:

25 people with an income   less than \$15,000          (25%)
50 people with an income   \$15,000 - \$25,000          (50%)
10 people with an income   greater than \$25,000    (10%)
15 people with                       no income data             (15%)

Thank you for your help with this.
~Chop
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RetiredCommented:
100% -  total of (% people less than \$15,000 + % people from  \$15,000 - \$25,000 + % people  greater than \$25,000) =

100% - (25% + 50% + 10%) =

100% - 85% =

15%

15% x 100 people = 15 people
Author Commented:
Thank you, but I already have that data. I am trying to calculate how to put those 15 people into one of the other three income groups. I am currently trying a method. If it works, I will share it here.
RetiredCommented:
OK - i misunderstood the question - my bad

you want to project which group of those with no income would fall into IF they started to work

since you have no other socioeconomic data (age, work history, education...) on the data set, about the only thing you could so is to distribute those with no income prorata (by the same ratio) as those who do earn

• 25% x 15  less than \$15,000
• 50%  x 15  \$15,000 - \$25,000
• 10% x 15  greater than \$25,000
Author Commented:
Thank you, for the new idea. The sum added to the three groups should equal 15 people
3.75 + 7.5 + 1.5  doesn't equal 15
Author Commented:
I am using a method that is similar to your last idea, but I first calculated new percentages that did not include the 15 people with no income data. That increased the percentages of the other three groups, etc.
RetiredCommented:
100/85 = 1,1765

25% x 1.1765 = 29 %

50% x 1.1765 = 59 %

10% x 1.1765= 12 %

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Author Commented:
Yes! Thank you very much for your assistance!
Author Commented:
Thank you, Paul.
Have a lovely evening.
~Chop
RetiredCommented:
thank U - U2
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