Let's assume that you can peel 'x' onions per minute.
Case A: You haven't started peeling onions yet.
To prepare dinner for 25 people, you need 60 onions. Since you can peel 'x' onions per minute, the time it will take to finish the work can be calculated as follows:
Time = Number of onions / Rate of peeling onions
Time = 60 onions / x onions per minute
Time = 60 / x minutes
So, in Case A, it will take 60 / x minutes to finish peeling all 60 onions.
Case B: You have already peeled 24 onions.
Now, you have already peeled 24 onions, and you need to peel the remaining 60 - 24 = 36 onions.
Similarly, using the same rate of peeling onions 'x' as before, the time it will take to finish the remaining work can be calculated as:
Time = Number of remaining onions / Rate of peeling onions
Time = 36 onions / x onions per minute
Time = 36 / x minutes
Therefore, in Case B, it will take 36 / x minutes to finish peeling the remaining 36 onions.
Please note that the value of 'x' (rate of peeling onions per minute) is not provided in the question, so we cannot determine the exact time without that information.