Question

Express as rupees using decimals:
$\left( i \right)$ 7 paise
$\left( {ii} \right)$ 7 rupees 7 paise
$\left( {iii} \right)$ 50 paise
$\left( {iv} \right)$ 235 paise

Answer 1

Hint: In this particular question use the concept that in 1 rupee there is 100 paise, so in 1 paise there is $\dfrac{1}{{100}}$ rupee, if there are x paise so in rupees it is equal to $\dfrac{x}{{100}}$ rupees, so use these concepts to reach the solution of the question.

Complete step-by-step answer:
Now as we all know that 1 rupee is equivalent to 100 paise.
So, 1 rupee = 100 paise.
So it can be written as
100 paise = 1 rupee.
So from the above information, 1 paise is equivalent to $\dfrac{1}{{100}}$ rupee.
Therefore, 1 paise = $\dfrac{1}{{100}}$ rupee.
So if someone has x paise, then in rupees it is $\dfrac{x}{{100}}$ rupees.
$ \Rightarrow x{\text{ paise}} = \dfrac{x}{{100}}{\text{ rupees}}$
$\left( i \right)$ 7 paise
So here x = 7
$ \Rightarrow 7{\text{ paise}} = \dfrac{7}{{100}}{\text{ = 0}}{\text{.07 rupees}}$
$\left( {ii} \right)$ 7 rupees 7 paise
So we have to convert 7 paise into rupees then add this value into 7 rupees to get the resultant into rupees.
So here, x = 7
$ \Rightarrow 7{\text{ paise}} = \dfrac{7}{{100}}{\text{ = 0}}{\text{.07 rupees}}$
So the total rupees = 7 + 0.07 = 7.07 rupees.
$\left( {iii} \right)$ 50 paise
Here, x = 50
$ \Rightarrow 50{\text{ paise}} = \dfrac{{50}}{{100}} = 0.50{\text{ rupees}}$
$\left( {iv} \right)$ 235 paise
Here, x = 235
$ \Rightarrow 235{\text{ paise}} = \dfrac{{235}}{{100}} = 2.35{\text{ rupees}}$
So this is the required answer.

Note: Whenever we face such types of questions the key concept we have to remember is that always recall that how many paise in one rupee which is stated above, so convert into how many rupees in 1 paise as above, then generalize it for some variable say x, i.e. how many rupees in x paise then use this generalize formula in all of the asked values as above, we will get the required answer.