Question
1.Mr Sim bought new tv at a discounted price of 15%.He paid $836, inclusive of 3% GST(goods and services tax. What was the original price of the tv?
2.How to calculate original price before GST and before discount? What is the formula? Tks
2.How to calculate original price before GST and before discount? What is the formula? Tks
Answers
Damon
original price = p
discounted price = 0.85 p
tax = .03(.85 p) = .0255 p
so
836 = .85 p + .0255 p = .8755 p
p = 954.88
check
.85 * 954.88 = 811.65
811.65*1.03 = 836 good
discounted price = 0.85 p
tax = .03(.85 p) = .0255 p
so
836 = .85 p + .0255 p = .8755 p
p = 954.88
check
.85 * 954.88 = 811.65
811.65*1.03 = 836 good