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# Practical application of ratios question.

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1. Thank you.
Please show the steps.
2. contents of the original mix (kg)
sand: 15 x 1/3
coir: 15 x 2/3
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Well you can't take any coir out so you're stuck with 10 kg of coir and you want that 10 kg to be 40% of your final mix

if 10 kg is 40% then 1 kg is 4%

the target amount of sand in the final mix is 60/4 (kg)
i.e 15 kg

how much new sand do you have to add to the amount of sand already in the original mix until it's got 15 kg of sand in it?

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Updated: June 16, 2016
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