Answer:

Explanation:
Please consider the complete question.
Dean loves rocks! He has 6 pieces of granite, 3 pieces of marble, 14 pieces of sandstone, and 1 piece of slate. What is the ratio of pieces of sandstone to pieces of marble in Dana's collection?
We can see that there are 14 pieces of sandstone and 3 pieces of marble.
Let us set a ratio.


Therefore, the ratio of pieces of sandstone to pieces of marble in Dean's collection would be
.