calculate a percentage (dec) difference based on two numbers
I wrote this function a while ago, but im not actually sure what its suppost to do, so ill test it here and see what it returns.
I think after running this function it returns the differents in percentage from the numbers where you provide the total amount and then the difference.
So if the total is 100 and the difference is 20 the result is 80%
Total is 100 and difference is 1 then the result is 99%
You can put in massive numbers, not sure if this would be useful like if you want to know the percentage difference between 14567732 and 1495653
Maybe i have called this function the wrong thing, as it takes the difference and then returns the difference as a percentage.
PHP
function calc_percentage_dec($total, $diff) {
$dec = $total - $diff;
return $dec_percent = ( $dec / $total ) * 100;
}Some randomly generated calculations to try:
Random Calculation One
Total: 557, Difference: 52Random Calculation Two
Total: 84015, Difference: 631587.066306047416 %
View Statistics
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"Olivia, my eldest daughter, caught measles when she was seven years old. As the illness took its usual course I can remember reading to her often in bed and not feeling particularly alarmed about it. Then one morning, when she was well on the road to recovery, I was sitting on her bed showing her how to fashion little animals out of coloured pipe-cleaners, and when it came to her turn to make one herself, I noticed that her fingers and her mind were not working together and she couldn’t do anything. 'Are you feeling all right?' I asked her. 'I feel all sleepy,' she said. In an hour, she was unconscious. In twelve hours she was dead. The measles had turned into a terrible thing called measles encephalitis and there was nothing the doctors could do to save her. That was...in 1962, but even now, if a child with measles happens to develop the same deadly reaction from measles as Olivia did, there would still be nothing the doctors could do to help her. On the other hand, there is today something that parents can do to make sure that this sort of tragedy does not happen to a child of theirs. They can insist that their child is immunised against measles. ...I dedicated two of my books to Olivia, the first was ‘James and the Giant Peach’. That was when she was still alive. The second was ‘The BFG’, dedicated to her memory after she had died from measles. You will see her name at the beginning of each of these books. And I know how happy she would be if only she could know that her death had helped to save a good deal of illness and death among other children."
I just checked google books for BFG, and the dedication is there.
https://www.google.com.au/books/edition/_/quybcXrFhCIC?hl=en&gbpv=1
Roald Dahl, 1986
