objectives: ratios · write ratios illustrating real-life situations; and solve ratio problems....
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BUSINESS MATHABM STRAND
Ratios Objectives:
Nutritional Info for a pack of Oatmeal Boardwork:
Show the ratio of the amount of the following:
a. protein to carbohydrates –b. carbohydrates to dietary fiber –c. protein to serving size –d. dietary fiber to energy –
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DEFINITION
What is a ratio? Remember:
A ratio is a comparison of two quantities by division.The ratio of a to b can be written in two ways:
Examples: How?
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How? How?
Examples:How do we use ratios in measurement?When comparing measurements, we usethe same unit of measurement in thenumerator as in the denominator.
(In this case, a ratio has no unit.)
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Examples: How?
Examples: How?
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One application of ratio is findingthe size or value of differentgroups of quantities given theratio.
Examples:
How? How?
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TO ILLUSTRATE RATIOSIN REAL-LIFE SITUATIONS
Other examples Situations:
a. We always use ratio in cooking: the ratio of eggs to flour;the ratio of salt to water; the ratio of chickens to pork.
b. When at the grocery store, I buy 5 bananas for 60 pesos.The ratio is written as 5:60 or 60:5 or 12:1.
c. At a grocery store, there was a sale of buy one take onefree loaf of bread at PHP70. That is, for every loaf of breadyou buy, you get one free. The ratio is 1:1.
PROBLEMS
Mastery Test:
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THANK YOU!
For lesson handout,visit:
http://jacs.weebly.com