What is the cost of 600g if 12g costs 40p?

Answer 1

First of all you need to work out the cost of One gram

40/12=3.33333333 pence

Then multiply the cost of One gram by 600 to get the cost of Six hundred grams

3.33333333*600 = 2000 pence or £20.00

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Alternatively 600/12 = 50

and 50 times 48 pence = 2000 pence or £20.00