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A 5% solution of a certain type of medicine is to be diluted to a 1% solution. Determine amt. of water added.
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I ignore your writing which follows after the problem formulation.
Below find my solution to your problem.
To dilute 5% solution to 1% solution by adding water, you need to add 4 times as much water as the volume of your original liquid.
Then the total amount of the obtained liquid will be 5 times the original volume,
and it will contain THE SAME amount of medicine as the original solution.
In this way you will dilute the solution from 5% to 1%.
Explained and solved.