Respuesta :

iGreen
1 Litre = 28p

1/2 of 1 litre = 1/2 * 28p = 14p

So the cost of 1 half of a litre is 14p.
TSO
1 litre = 28p

then divide by 2 on both sids

1/2 litre = 28/2 p

so 

1/2 litre = 14p

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