If I'm correct, 100p must be in £1. Since we know that, we can convert it into an equation, like so:

100p = £1

Now, since there are £12, multiply both sides of the equation by 12.

1200p = £12

We're also given 50p to determine what fraction of £12 is from 50p. So place 50p over the total amount of pence, which is 1200.

50p/1200p

Simplify from here on out. Cancel out the p's.

= 50/1200

= 5/120

=

**1/24**.