Thread: Difficult mixing ingredients

I have 450 grams of salt and flour mix. How many grams of flour should I add to reduce the percentage of salt in the mixture to 90% of what it was?

(a) 50
(b) 10
(c) 30
(d) 45
(e) 60

Originally Posted by DivideBy0

I have 450 grams of salt and flour mix. How many grams of flour should I add to reduce the percentage of salt in the mixture to 90% of what it was?

(a) 50
(b) 10
(c) 30
(d) 45
(e) 60

You want to add x grams of flour to the 450 grams of salt. Thus you will have a total mass of 450 + x grams. This will make the amount of salt be 90% of the total so:
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So we need to add 50 grams of flour.

-Dan