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To find out the percentage, you first need to express the proportion as a fraction. In this case we want 70 out of 350, so you write 70/350. To convert this to a percentage, you multiply by 100, so you get 7,000/350. This then works out at 20. Therefore 70 kilometres is 20% of 350 kilometres.

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Q: What percentage of 350 kilometres is 70 kilometres?
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