Question

Five CDs, which is 1/8 of Lisa's collection, were gifts. How many were not gifts?

Explain:

Answer 1

35

Explanation:

if you multiply 5*8 you will get 40 where 5 is 1/8. From 40 you would subtract 5 from to get the remaining amount of CD's.

Answer 2

35

Explanation:

`\begin{array}{ccccc}5&-&(1)/(8)&of\ collection&\text{multiply by 8}\\\\8\cdot5&-&8\cdot(1)/(8)&of\ collection\\\\40&-&1&collection\end{array}`

The full collection is 40 CD's. 5 of them are the gifts.

40 - 5 = 35 are not gifts.