The estimate is zero because 2-2 is 0. u find the common denominator, then you subtract
10% = 50
30% = 150
1% = 0.5
2% = 1
150 + 1 = 151 books should be mysteries
First you put a 1 under the 2.Then you multiply 85*2 and you get 170.Next you multiply 8.2*1 and you get 8.2.Finally, you divide 170 by 8.2 and get 20.73.
So, your answer to 85/8 times 8.2 = 20.73.
Hope that helped.
