The price of raw materials has gone up by 15%, labor cost has also increased from 25% of the cost of raw material to 30% of the cost of raw material. By how much percentage should there be reduction in the usage of raw materials so as to keep the cost same?

• ক 0.28
• খ 0.27
• গ 0.17 ✅ সঠিক উত্তর
• ঘ Cannot determined