If in a rock collection 60% of the rocks are Quartz how many rocks are Quartz if there are 35 rocks?

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asked Jun 7, 2017 184k views

2 Answers

Stefan Wanitzek · Answer 1 · 2017-06-12T11:55:34+0000

If 60% of the rocks are Quartz, you need to multiply the total number of rocks by 60% (this is the same as multiplying by 0.6 as 0.6=60%)
So 35 x 0.6 = 21
Therefore there are 21 quartz rocks in the collection.

If in a rock collection 60% of the rocks are Quartz how many rocks are Quartz if there are 35 rocks?

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