# Thread: 20:1 RATIO eXPLAINED

1. Join Date
Oct 2007
Location
VENTURA, California, USA
Posts
3,636

## 20:1 RATIO eXPLAINED

Here's a little math for Saturday:

20:1 Ratio Explained.
I wasn't satisfied with any answer. I checked some math sites and wikipedia. Here is my claim.

From wikipedia.org upon searching "ratio":

"If a school has a 20:1 student-teacher ratio, there are twenty times as many students as teachers."

Okay, so 20:1 means "20 to 1" or "20 for every 1." So if you take a group of 21 people from that school, there will be 20 students plus 1 teacher.

Now if it said "1 in 20 people at the school are teachers," then in that group of twenty there is 1 teacher. (1 IN 20) So in that case, 19 in that 20 are students and 1 in that 20 is a teacher. Now that we've said "1 in 20" there are only 19 times as many students as teachers.

Therefore, a ratio of 1:20 means "1 for every 20" and NOT "1 in 20." The problem is the "IN", which everyone here has claimed is acceptable when using to word ratios.

Ernie

2. Join Date
May 2008
Location
Ballina, NSW - Australia
Posts
232

## Re: 20:1 RATIO eXPLAINED

20:1 = 20 to 1

20 litres fuel : 1 litre oil

21 litres of premix is made total.

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