Question

Harrison has 30 cds in his music collection. If 40% of the cds are country and 30% are pop, how many are other types of music

Answer 1

Well you have to find out how many cd is 40% and 30% 
30% = 30x.3=9
40% = 30x.4=16
now add 16 and 9
16+9=25 now subtract 25 from 30 and see that you have 5 cd of a different type of music to find that as a % divide 5 by 35 to get .14 I rounded it to the nearest hundreth now move the decimal over 2 spots to get 14%

Answer 2

There are 9 other CD's of a different genre.