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7p

Begin by converting ml to litres: 100ml = 0.1l

1l = 70 p

.1l = x

To solve for x, cross multiply then divide.

70p * .1 litre / 1 litre = 7p

(While it would be faster to divide by ten upon recognizing the pattern, always cross multiply because the numbers will not always perfectly work out, especially when decimals are involved)

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6y ago
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Q: If 1 litre costs 70p what will 100ml cost?
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