Please help me with this question.

Answer:
1:4
Step-by-step explanation
if the ones with nuts are 1/5 it means that the ones without is 4/5
1/4 is the same as writing 1:4
Answer:
1/4
Step-by-step explanation:
1/5 contain nuts => 4/5 do not contain nuts
(1/5):(4/5)=1/4