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Question 1 of 3

There are 10 ml of eye drops and 13 % of the solution by volume is Distilled Witch Hazel. How many ml of Distilled Witch Hazel are there in the 10 ml of eye drops?

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ml
There are 1.3 ml of Distilled Witch Hazel in 10 ml of eye drops.

Amount of Specific Item = Percentage    x Total Amount
100

Amount of Witch Hazel =  13  x 10 ml
100
Amount of Witch Hazel = 1.3 ml

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Question 2 of 3

Zinc and Coal Tar Paste BNF contains 6 % Coal Tar by mass. How many grams of Coal Tar are there in 25 g of Zinc and Coal Tar Paste?

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g
There are 1.5 g of Coal Tar in 25 g of the Paste.
Amount of Specific Item = Percentage    x Total Amount
100

Amount of Coal Tar =   6    x 25 g
100
Amount of Coal Tar = 1.5 g

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Question 3 of 3

Zinc and Coal Tar Paste BNF contains 38 % Starch by mass. How many grams of starch are there in 175 g of Zinc and Coal Tar Paste?

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g
There are 66.5 g of Starch in 175 g of Paste.

Amount of Specific Item = Percentage    x Total Amount
100

Amount of Starch =   38    x 175 g
100
Amount of Starch = 66.5 g

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