Finding the Percentage of a Group of Items / Total Items

Question

This may sound very stupid, but my brain stuck and I can't get it Right.

What I have:

What I want:

Based on the item's in the Category, I want to find the Percentage every Category takes up.

These are the variables i have:

$category1_items    <- All items of an Individual Category
$all_items          <- All Items (#)
$all_categories     <- All Categories (#)

I need to calculate $category1_percentage (and of every other category) so that i can display the Percentage of each individual Category.

I can add any other variable i need.

Can someone help me ?

could you explicit what are your variables? (array,double,etc) — rlartiga, Apr 09 '14 at 21:12
I don't understand. Every variable stores a number, if that's what you mean. — Mini John, Apr 09 '14 at 21:14
But for the Percentage #(100%) i need a multiplier (*)... right ? — Mini John, Apr 09 '14 at 21:18
yes, for putting in a percentage you need to multiply by 100 — rlartiga, Apr 09 '14 at 21:19

score 3 · Accepted Answer · edited Apr 09 '14 at 21:23

3

$category1_items / $all_items $\cdot 100$

edited Apr 09 '14 at 21:23

Mini John

answered Apr 09 '14 at 21:21

rlartiga

1 Answers1