Class 7 Maths Comparing Quantities Introduction


In our daily life, we generally compare two things like comparing height of two persons, speed of two trains, etc. We come across terms like percentage, ratio, etc when dealing with comparing quantities.

For example let height of Heena is 150 cm and height of Amir is 75 cm.


We find that Heena is two times taller than Amir Or Amir’s height is 1/2

of Heena’s height.

We write the ratio of the heights as:

Heena’s height : Amir’s height is 150 : 75 or 2 : 1.

We see that the ratio for two different comparisons may be the same.

For comparing two quantities, the units must be the same.

In this chapter, we will study everything about comparing quantities.

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