When you plot the data in a pie graph, it looks like that shown in the picture. A circle is formed when you draw a point and connect it from end to end forming a complete revolution. One revolution equals 360°. Therefore, each piece of pie for each type of book is a fraction of one revolution. The fraction can be determined by dividing the number for a specific type of book to the total number of books. Specifically, the fraction for the Self Help slice would be 90/375 which is equal to 0.24 or 24%. Then, 24% of 360 is 86.4. Therefore, the central angle formed by the Self Help slice is 86.4°.
It is a mixed repeating decimal bc no 3 is not repeating It start at 18
To convert into fraction you take all the decimals (318) then you subtract the non repeating decimal (318-3=315
315 is the nominator
For the denominator you count how many repeating decimal(2) then you put 2 nines For every non repeating decimal you add a zero
315/990. =7/22
2.3181818....= 2(7/22)