Question

If $30\% $ of Rs.60 is spent, find the remaining amount.
(A) Rs.18
(B) Rs.36
(C) Rs.42
(D) None of these

Answer 1

Hint: Calculate $30\% \times 60$ which gives the amount spent. Subtract this value from 60 to get the answer.

Complete step by step answer:
We are given the amount of Rs.60 out of which $30\% $ is spent.
We are asked to compute the remaining amount.
So, this is a problem related to percentage.
We will first determine how much is $30\% $ of Rs.60.
This is done as follows:
$30\%$ of Rs.60$ = 30\% \times 60 = \dfrac{{30}}{{100}} \times 60 = \dfrac{{1800}}{{100}} = 18$.
Thus, the amount spent is Rs.18.
Therefore, the remaining amount will be equal to the difference between the total amount and the amount spent.
Thus, we have Remaining amount $ = 60 - 18 = 42$.

Hence the required answer is Rs.42.

Note: It is often observed that students stop at the step where the amount spent is calculated.
We need to remember that ‘remaining amount’ is not equal to the ‘amount spent’.