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How to calculate the main proportion of Taobao? (Taobao math problem)
The premise is that at present you only have two categories: life service and clothing, shoes and bags. You said that life service 17 points, the main clothing shoes and bags sold 8 points; If the main business continues to increase, others will not increase, that is, they will not sell, so they can reach more than 90% soon.

The main proportion is the main sales divided by the total sales. At present, all the goods you sell are 17 (life service) +8 (clothing, shoes and bags) =25.

Main business accounts for 8/( 17+8)=8/25=32%.

In the future, if you sell more clothes and shoes, less life services or simply put the main clothes and shoes in a secondary position, you can use the following formula to calculate, in two cases:

1) Only clothing, shoes and bags will be sold from now on. If it is set to X, the main business accounts for 90%. Requirements: (8+x)/(8+ 17+x)=90%, available: x= 145; In other words, if you don't sell anything except the main business, you need 145 main businesses to reach 90%.

2) If goods other than the main business are still on sale, the situation will be more complicated. If the main business sells X and others sell Y, there is (8+x)/(8+ 17+x+y)=90%, and it can be obtained: x= 145+9y, that is, if the life service sells 65445.

Note that the premise is that at present you only have two categories: life service and clothing, shoes and bags, otherwise the situation will be complicated!

I hope I can help you.