Dan makes pineapple sorbet
he uses 2 and 1/2 of lemons
work out how many people he makes pineapple sorbet for?

We know that 1/2 of a lemon makes enough sorbet for 6 people, so we need to find out how many times 1/2 goes into 2 1/2.

To find out how many times 1/2 goes into 2 1/2, we need to divide. 
That gives us 5.

Next, we need to multiply 5 and 6.
That gives us 30.

Now we know that Dan made pineapple sorbet for 30 people.

If you need any further explanation, just let me know! :)

The answer is (a) 12-2(-1)(6)2(6)=12