Final answer:
The percentage change in the answer due to Shubham's mistake is -96%, which means the mistaken result is 96% less than the intended operation. None of the provided options exactly match this percentage change, but the closest is option C, which is -80%.
Step-by-step explanation:
The percentage change in the answer due to Shubham's mistake can be calculated by comparing the intended operation with the mistaken operation. Let's assume the original number to be 'x'. If Shubham wanted to multiply the number by 5, the intended result would be 5x. However, mistakenly dividing by 5, the result is x/5. To find the percentage change, we look at the ratio of the mistaken result to the intended result: (x/5) / (5x) = 1/25.
Now, to express this as a percentage change, we subtract 1 from this ratio and then multiply by 100: ((1/25) - 1) x 100. This calculation yields -96%, meaning that the result of the mistaken operation is 96% less than intended operation. As none of the options exactly matches this percentage change, the closest option provided is -80% (Choice C), but it is not exact. Therefore, the actual percentage change is beyond the given options.