Metric Conversions, Giving The Correct Amount For Injection, Calculating Infusion Times, Solution Strength Worksheet With Answers Page 19
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22LDU Maths, Stats and Numeracy Support
Working with Percentage Strength
You need to know that 5 % means
this means 5 g in 100 ml
Example 1: How many grams of Dextrose will a patient receive from 2 litres of 5%
Dextrose solution? (This is an example of a w/v, weight per volume question).
Answer 1:
Example 2: You have a cream that is 8% zinc oxide. How many grams of zinc oxide are
there in a 30g tube of cream? (This is an example of a w/w, weight per weight
question).
Answer 2:
Try the following questions
1) A patient is given 1 litre of 5% dextrose. How many grams of dextrose do they
receive?
2) A patient is given half a litre of 0.9% normal saline solution over 6 hours, how
much sodium will they get?
3) A patient is given 2 litres of 0.45% saline. How many grams of sodium will the
patient receive?
4) Which is stronger 0.9% Normal saline or 0.45% Normal saline?
5) How many grams of dextrose are needed to make up 2 Litres of 5% solution?
6) How many grams of medication do you have in 20g of 12% w/w ointment?
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