LLD - Design — Splitwise (Expense Sharing)
In a percentage split system, if the sum of percentages provided is 110%, what is the main issue and how should it be fixed?
In a percentage split system, if the sum of percentages provided is 110%, what is the main issue and how should it be fixed?
medium📝 Analysis Q14 of 15
Step-by-Step Solution
Solution:
Step 1: Identify the problem with sum of percentages
Percentages must sum to 100% (or 1 in decimal) to correctly split amounts.Step 2: Determine the fix
If sum is 110%, it exceeds total amount. Normalize by scaling percentages so they sum to 100%.Final Answer:
The sum exceeds 100%, fix by normalizing percentages to sum to 100% -> Option DQuick Check:
Sum > 100% requires normalization [OK]
Quick Trick: Percentages must sum to 100%, else normalize [OK]
Common Mistakes:
- Ignoring sum validation
- Assuming sum can be more than 100%
- Trying to add missing percentage when sum is too high
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