Question

The exchange rate for Hong Dollars is US$/HK$ = 12.81¢ (cents) (i.e. 0.1281). How many US dollars will it cost to purchase a hard drive priced at HK$ 390? Be sure to indicate US$ as the currency unit in your answer.

Answer 1

It would costs US$ 3,044.5 to purchase a hard drive priced at HK$ 390.

Explanation:

We have that

`(US)/(HK) = 0.1281`

This means that 1 US dollars is worth 0.1281 HK dollars.

How many US dollars will it cost to purchase a hard drive priced at HK$ 390?

This can be solved by a simple rule of three.

1US$ - 0.1281 HK$

x US$ - 390 HK$

`0.1281x = 390`

`x = (390)/(0.1281)`

`x = 3,044.5`

It would costs US$ 3,044.5 to purchase a hard drive priced at HK$ 390.