Question

A 15% increase in the school fee of a class is Rs 120. What is the original fee?​

Answer 1

Given: A $15$% increase in the school fee of a class is Rs$120$.

We have to find the original fee for the class.

For this, we will assume the original fee as$xRs.$ and then simplify the equation.

As we know that a $15$% increase in the school fee is Rs$120$.

We are solving in the following way:

Let assume the original fee of the class will be$x.$

$=>x\times\frac{15}{100} =120\\\\=>x=\frac{120\times100}{15} \\\\=>x=800$

We get $x=800Rs.$

Hence, the original fee of the class will be$800rs.$

Answer 2

To find : original fee of school .

Given :  $15\ \%$ increase in the school fee of a class is $Rs 120$.

Solution :

• Let $x$ be the original school fees.
• Then according to given condition we write as-

                     $15\ \% \ x = 120$

• As we know percentage is expressed in term of fraction of 100

       hence we write ,  $\frac{15}{100}\times x= 120$

• leaving variable $x$ at LHS and transfering constants we get,

                                       $x = \frac{12000}{15}$

• On dividing we get $x = 800$

      Hence , original fees of school is $Rs \ 800.$