First you divide sale cost which is $21.75 by the original cost of the shirt being $30.
Once you divide 21.75 into 30 dollars you'll get 0.725
Now you wanna multiply that 0.725 by 100% which will then
give you the total 72.5%
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Hi there! The answer is ( - 7, 5)
The standard form of the equation of a circle is the following:

In this equation r represents the radius of the circle and the point (a, b) is its centre.
Therefore, the centre of the circle

is the point ( - 7, 5).