Question

if the rate of Sale Tax increases by 5% the selling price of an article goes up by rupees 40 .find the marked price of the article

Answer 1

marked price= x
if tax increases price increase by 5% and that is 40 so
x+5%x=40
x+x/20=40
21x/20=40
21x=800
x=800/21
x=38.09