Question

An article was purchased for Rs.$1239$ including GST of $18\%$. Find the price of the article before GST was added?

Answer 1

Find the price of the article before GST was added.

Let the price of the article before adding GST be $x$.

Therefore,

$\begin{array}{l}x+x\times \frac{18}{100}=1239\\ \Rightarrow x+\frac{9x}{50}=1239\\ \Rightarrow \frac{59x}{50}=1239\\ \Rightarrow x=\frac{1239\times 50}{59}\\ \Rightarrow x=21\times 50\\ \Rightarrow x=1050\mathrm{Rupees}\end{array}$

Hence the price of the article before GST addition was $1050$ rupees.