Ratio and Proportion Tricks

Ratio:

The ratio of two quantities a and b in the same units, is the fraction and we write it as a : b.

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In the ratio a : b, we call a as the first term or antecedent and b, the second term or consequent.

Eg. The ratio 5 : 9 represents 5 with antecedent = 5, consequent = 9.
9

Proportion:

The equality of two ratios is called proportion.

If a : b = c : d, we write a : b :: c : d and we say that a, b, c, d are in proportion.

Here a and d are called extremes, while b and c are called mean terms.

Product of means = Product of extremes.

Thus, a : b :: c : d (b x c) = (a x d).

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