i need help i hvae done everything but i dont know what i did wrong i did £11.40-£20=£8.60 but it says its wrong how?

Answer: It said 2 chickens, not 3.
Also, when you got your final answer, you have to subtract it from 20, because you want to find the change.
Step-by-step explanation:
This is the mistakes I saw, and I mentioned them above. :)
Answer:
£11.43
Step-by-step explanation:
£2.65x2=£5.12
£1.15×3=£3.45
£5.12+£3.45=£8.75
£20.00-£8.75=£11.43
The mistake was in the first line of your answer, you multiplied by 3 instead of 2.