A household generates 20 kg of kitchen waste per week. If they compost and reduce this waste by 15 %, how many kilograms of waste are composted each week?

Step-by-step solution

1. Calculate 15 % of 20 kg: $20\times 0.15=3$ kg.
2. This amount is composted.

Concept tested: Waste reduction calculation

Published 16 October 2026 · How this solution was prepared and checked