Question: 12 interest means how many rupees?
Answer: 1 rupee interest is calculated on the principal amount per month. For example, if a person borrows 100 rupees at 1 rupee interest he has to pay 1 rupee interest every month. So he has to pay 12 rupees in 1 year. Therefore, 1 rupee interest on 100 rupees means the percentage of interest is 12%.