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primary 6 | Maths
| Percentage
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So, Clinton had 4/5 of what Duncan had.
If Duncan has 5 units of assessment books...
then Clinton had 4 units of assessment books.
They have a total of 9 units of assessment books.
9 units = 45 assessment books
1 unit = 5 assessment books
5 units = 25 assessment books
So, Duncan has 25 assessment books.
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