SOLUTION: I am horrible at math, How do you find proportions and ratios?

Question 351064: I am horrible at math, How do you find proportions and ratios?
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
A ratio is a comparision of two quantities of the same kind.
eg: John has 4 books. milton has 12 books
the ratio of books of john to milton = 4/12
..
john has 10 dollars
milton has 20 dollars
...
The ratio is 10/20
...
so you can compare only similar quantities.
length to length in same units 10inches/20inches = 10/20
weight to weight in same units 100 grams to 200 grams 100/200
volume to volume in same units
.....
Proportion is a comparision of two ratios. Again same units
eg: 16 /4 is the same as 64/16 . when the numerator and denominator are divide by 4 we get 16/4
...
so the two ratios are in proportion.
...
3/9 is proportional to 21/63
2/8 is proportional to 30/120

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