Calculating Total Amounts
In this section you will find out how to calculate the total amount present, given the amount of a specified item and the percentage that the specified item is of the total amount.
If an amount of Paraffin Ointment BP 1988 contains 30 g of Hard Paraffin and this is 3 % of the total amount, what is the total amount of Paraffin Ointment?
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The total amount of Paraffin Ointment is 1000 g.
3
Total amount of Paraffin Ointment = 1000 g
percentage = actual amount of item x 100 %
total amount all items
which rearranges to give:total amount all items
Total amount = actual amount of item x 100
Percentage
Total amount of Paraffin Ointment = 30 x 100 gPercentage
3
Total amount of Paraffin Ointment = 1000 g