Question

A TV that usually sells for $178.09 is on sale for 30% off. If sales tax on the TV is 5%, what is the price of the TV, including tax?

Answer 1

Since the TV is on sale for 30%, we can either multiply 178.09 by 30% and then subtract that from 178.09, or we can just multiply 178.09 by 70%. The latter is an easier process.

The sales tax is 5%. We can either multiply by 5% and then add this to the total cost, or we can just easily multiply by 105% to make our calculations simpler.


`178.09* (70)/(100) * (105)/(100) = 178.09 * 0.7* 1.05 = \boxed{130.90}`

Answer 2

`178.09 * (70)/(100)* (105)/(100) = (178.09 * 70 * 105)/(100* 100) = (1308961.5)/(10000) = 130.89615 \approx \boxed{130.90}`

Your answer is $130.90

Note: We multiply by 70/100 because of the 30% discount. 100 - 30 = 70. So we have to multiply by 70%.

Also, we multiply by 105/100 because there is 5% tax. The tax means that we have to pay more which means 100 + 5 = 105.

Hope this helped :D