Question

An article was purchased for $Rs.1239$ a including GST of $80\%$. Find the prize of article before GST was added?

Answer 1

selling price of article= cost price + gst

let CP = $x$

$SP=CP+\frac{80}{100}CP$

$SP=x+\frac{80}{100}x$

$1239=x+\frac{4}{5}x$

$9x=1239\times 5$

$x=Rs.688.33$