Answer:
3.2%
Step-by-step explanation:
You want to find the area of the hole and the area of the board. The area of the board is 21x42 which is 882 inches squared. The circular hole has a radius of 3 inches so [tex]\pi[/tex]3² which is 9[tex]\pi[/tex].
Now put in calculator [tex]\frac{9\pi }{882}[/tex] which is pi over 98 which simplifies to 0.032.
