The price of a computer with 5% GST is $8190.
- How much does Adam have to pay if the GST is increased to 13%?
- How much more must Adam pay because of the GST increase?
(a)
Price of the computer with 5% GST
= 100% + 5%
= 105%
105% → $8190
1% → 8190 ÷ 105 = $78
100% → 100 x 78 = $7800
Price of the computer with 13% GST
= 100% + 13%
= 113%
Amount that Adam has to pay
= 113% x 7800
=
113100 x 7800
= $8814
(b)
Amount more that Adam must pay because of the GST increase
= 8814 - 8190
= $624
Answer(s): (a) $8814; (b) $624