Tiffany bought one oven at 25% discount off its original price. She paid a total of $321 for it, which was inclusive of 7% GST on the discounted price. What was the original price of the oven?
|
Percent expressed as units |
Percent expressed as % |
Amount |
Original price |
100 u |
|
? |
Discount |
- 25 u |
|
|
Discounted price |
75 u |
100% |
$300 |
GST |
|
+ 7% |
|
Amount to pay |
|
107% |
$321 |
Price of the oven with 7% GST in percent
= 100% + 7%
= 107%
107% of the oven with 7% GST = 321
1% of the oven with 7% GST = 321 ÷ 107 = 3
100% of the oven with 7% GST = 100 x 3 = 300
Price of the oven at 25% discount in units
= 100 u - 25 u
= 75 u
Discounted price = 100% of the price to pay for before adding GST.
75 u of the oven without GST = 300
1 u of the oven without GST = 300 ÷ 75 = 4
100 u of the oven without GST = 100 x 4 = 400
Original price of the oven = $400
Answer(s): $400