Roy is going to increase the size of his patio to make room for a new bbq grill. the ratio of the area of the old patio to the area of the new patio is 2 1 : 63. convert this ratio to a unit rate and explain what this unit rate means in the context of this problem.

The ratio of 21:63 can be written as a simple ratio of 1:3. It is important you have labels on your numbers.

Here is the ratio rewritten with labels:

21 - old patio: 63 - new patio

1 - old patio: 3 - new patio

This can be switched around to say 3:1 as the ratio of the area of the new to the area of the old.

Each of the number would be square units because they are measuring area.

The discount is 8.70 . you dont tell us the percent of tax added so there is no way to find out, unless i'm not seeing anything. without tax its 37.70