Ratio

Ratio

In mathematics, a ratio is a relationship between two numbers indicating how many times the first number contains the second.[1] For example, if a bowl of fruit contains eight oranges and six lemons, then the ratio of oranges to lemons is eight to six (that is, 8:6, which is equivalent to the ratio 4:3). Similarly, the ratio of lemons to oranges is 6:8 (or 3:4) and the ratio of oranges to the total amount of fruit is 8:14 (or 4:7).

Ratio and Proportion

Exam Prep Study Notes (Things to remember) 

Ratio
Comparison of two or more different values or quantities
Rate

Comparison of two types of measurement units such as distance, time, quantity etc.

Examples are miles per hour, km per sec, liters per sec etc

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Tips

Comparison of figures
The ratio of the sides of two similar figures will be the same as the ratio of the perimeters of the two similar figures.
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CONVERSION UNITS

Distance units
foot
12 inches
inch
2.54 cms
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Area units
acre
(1/640) miles2
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Volume units
cup
8 fluid ounces = .5 pint = .25 quart = 1/16 gallon
fluid ounce
(1/8) cup = (1/16) pint = (1/32) quart = (1/128) gallon
gallon
128 fluid ounces = 231 inches3 = 8 pints = 4 quarts
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