SOLUTION: A cd shelf can hold 256 cds. Currently 3/4 th of the shelf has cds. How many more cds must be added so that 7/8 th of the shelf has cds ? A 32 b 16 c 8 d 24 e 48

Algebra ->  Percentage-and-ratio-word-problems -> SOLUTION: A cd shelf can hold 256 cds. Currently 3/4 th of the shelf has cds. How many more cds must be added so that 7/8 th of the shelf has cds ? A 32 b 16 c 8 d 24 e 48       Log On


   

Question 271930: A cd shelf can hold 256 cds. Currently 3/4 th of the shelf has cds. How many more cds must be added so that 7/8 th of the shelf has cds ?
A 32 b 16 c 8 d 24 e 48

Answer by mananth(16946) About Me  (Show Source):
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A cd shelf can hold 256 cds. Currently 3/4 th of the shelf has cds. How many more cds must be added so that 7/8 th of the shelf has cds ?
A 32 b 16 c 8 d 24 e 48
3/4 ful means 256 * 3/4 = 192 cds
3/4 full means 192 CDs
7/8 full means ? (192* 7/8 ) / 3/4
= 192 * 7 *4 / 3*8
= 224 Cds.
256 -224 = 32
32 CD's have to added