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7th Class Maths Chapter "Ratio - Applications" Topic wise videos

7th Class Maths Chapter "Ratio - Applications" Topic wise videos


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).


The numbers in a ratio may be quantities of any kind, such as counts of persons or objects, or such as measurements of lengths, weights, time, etc. In most contexts both numbers are restricted to be positive, and the second to be not zero.

A ratio may be either specified by giving both constituting numbers, written as "a to b" or "a:b", or by giving just the value of their quotient 
a/b
, since the product of the quotient and the second number yields the first, as required by the above definition.

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