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How can mysql find the proportional relationship through an SQL statement?

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Author: User
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For example, a table contains three fields: product, price, and date: a10.2, 20151008a9. 2, 20151009a7. 2, 20151010b11. 2, 20151008b10. 2. how do I write mysql statements when I search for the percentage of the total number of times that the price of each product in history is less than 10 ￥? Thanks for the results. how can I write SQL statements like a23b02? Mysqlsql

For example, a table contains
Product, price, and date fields
A 10.2, 20151008
A 9.2, 20151009
A 7.2, 20151010
B 11.2, 20151008
B 10.2, 20151008

How can I write mysql statements when I search for the percentage of the number of times that the price of each product is less than 10 ￥ in history to the total number of times that the product appears?
Thank you.
Search results should be similar
A 2/3
B 0/2

How to write such SQL statements?

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