Question

$1,725 couch; 7.5% tax, how much is the cost of the couch?

Answer 1

The total cost of the couch including tax is `1,854.38`

Explanation:

% or percent means "out of 100" or "per 100" therefore 7.5% can be written as `7.5/100`

To calculate the full cost of the couch `C` is:

`C = 1725 + (7.5/100)1725`

`C = 1725 + 12937.5/100`

`C = 1725 + 129.375`

Rounding to the nearest dollar gives:

`C = 1725 + 129.38`

`C = 1854.38`