If the denominators (bottom numbers) are the same number, you just add/subtract the numerators left to right
Answer:
The area of the shape is 
Step-by-step explanation:
we know that
The area of the shape is the area of a three quarter of circle
The area of a three quarter of circle is equal to

we have

substitute

(-9) - (-2) = -7
that should be the answer you subtract
2.81
+3.72
______
6.53
BENCHMARKED=6.5