The selling price of an item is $600. It is marked down by 10%, but this sale price is still marked up from the cost of $450. Find the markup from cost to sale price.
The markup is $ (Round to the nearest dollar as needed.)

When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. if you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.

I'm gonna have to say about 13 percent