LLD - Design — Splitwise (Expense Sharing)
Given a total amount of 120 and a percentage split {'A': 25, 'B': 75}, what is the amount user B should pay?
Given a total amount of 120 and a percentage split {'A': 25, 'B': 75}, what is the amount user B should pay?
medium📝 Analysis Q4 of 15
Step-by-Step Solution
Solution:
Step 1: Calculate user B's share using percentage
User B's percentage is 75%, so multiply 120 by 0.75 = 90.Step 2: Confirm calculation
120 * 0.75 = 90, which is the amount user B pays.Final Answer:
90 -> Option BQuick Check:
Percentage split calculation = 90 [OK]
Quick Trick: Multiply total by percentage/100 for amount [OK]
Common Mistakes:
- Using percentage as amount directly
- Adding percentages instead of multiplying
- Confusing user A and B percentages
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