# 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}

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