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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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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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Jun 7, 2017
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If in a rock collection 60% of the rocks are Quartz how many rocks are Quartz if there are 35 rocks?
Mathematics
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Sparkup
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35 - 100%
7 - 20%
21 - 60%
Technicallynick
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Jun 8, 2017
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Technicallynick
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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.
Stefan Wanitzek
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Jun 12, 2017
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