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How many grams of cream with 10% fat should a barista add to 120 grams of 20 % fat to get a mixture with 18 % fat

 Aug 11, 2021
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Hi Guest,

 

10% fat = 0.1x

x = the solution, what we want to find

120 grams of 20% fat = 0.2 * 120

What we want is mixture of 18% 

 

So....

 

0.1x + 0.2 * 120 = 0.18 (x + 120)

 

Solve:

 

0.1x + 24 = 0.18 (x +120)

 

0.1x + 24 = 0.18x + 21.6

 

24 = 0.08x + 21.6

 

x = 30

 

Barista should add 30 grams of cream in order to obtain 18% fat mixture.

 Aug 11, 2021

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