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# Obtaining Total Debt Service Ratio bit of a glitch

Posted on 2012-03-28
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Hello,
I have an online app that as part of it being used determines your total debt service ratio simply by dividing expenses / income

Found if people were to put in crazy number like:
I earn \$2000 and have expenses that are \$5000 it returns 2.5 in this case.
Given my code below, it strips off the 2 and returns with a 50% debt service ratio.

Any idea how it should look so it will return a proper fraction when the numbers are sensible, but return differently if you are way over on your expenses?

I suppose I could test if the expenses are greater then the income but wondered if there was a better way of doing it.

Hope that makes some sense.
``````\$tdsr = \$expenses / \$income;

\$tdsr = round(\$tdsr,2);
\$new_tdsr = explode(".", \$tdsr);
\$tdsr = \$new_tdsr[1];

if (strlen(\$tdsr) == 1) {
\$tdsr = \$tdsr."0";
}
``````
0
Question by:tjyoung
1 Comment

LVL 108

Accepted Solution

Ray Paseur earned 500 total points
ID: 37779241
See http://www.laprbass.com/RAY_temp_tjyoung.php
Outputs: WITH EXPENSES = 5000 AND INCOME = 2000 YOUR TOTAL DEBT SERVICE RATIO IS 250% AND THIS IS TOO HIGH!
``````<?Php // RAY_temp_tjyoung.php
error_reporting(E_ALL);

// TEST DATA
\$expenses = 5000;
\$income   = 2000;

// COMPUTE THE RATIO AS A PERCENTAGE VALUE
\$tdsr = (\$expenses / \$income) * 100.0;

// PREPARE A PRINTABLE VERSION (COULD DO THIS WITH OTHER NUMBERS, TOO)
\$tdsr_printable = number_format(\$tdsr) . '%';

// SHOW THE WORK PRODUCT
echo "WITH EXPENSES = \$expenses AND INCOME = \$income YOUR TOTAL DEBT SERVICE RATIO IS \$tdsr_printable ";
if (\$tdsr > 50.0) echo "AND THIS IS TOO HIGH!";
``````
HTH, ~Ray
0

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