Ex.8.2 Q7 Compairing Quantities - NCERT Maths Class 7

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Question

In a city, \(30\%\) are females, \(40\%\) are males and remaining are children. What per cent are children?

 Video Solution
Comparing Quantities
Ex 8.2 | Question 7

Text Solution

What is Known?

In a city, \(30\%\) are females, \(40\%\) are males and remaining are children.

What is Unknown?

Percentage of children.

Reasoning:

Consider the total percentage as \(100\%\). Since, percentage of males and females is known, percentage of children can be obtained by subtraction total percentage of males and females from \(100\%\).

Steps:

Total percentage is equal to \(100\%\). out of \(100\% , 30\%,\) are females, \(40 \%\) are females and the remaining are children.

 So, the percentage of children 

\[\begin{align}&= 100\% - 30\% - 40\% \\&= 30\% \end{align}\]