Question

what is the cost of 1 half of a Litre if 28p per Litre

Answer 1

1 Litre = 28p

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

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

Answer 2

1 litre = 28p

then divide by 2 on both sids

1/2 litre = 28/2 p

so 

1/2 litre = 14p