Barter and money, modern forms of money, how banks link savers and borrowers, terms of credit, formal and informal loans, and self-help groups.
| Simple interest | principal × rate × time (rate and time in the same unit) |
| Collateral | an asset pledged as a guarantee: land, a building, livestock |
| Formal sources | banks, cooperatives |
| Informal sources | moneylenders, traders, relatives, friends |
| Grameen Bank | Bangladesh, founded by Muhammad Yunus |
₹21,000 is borrowed for 12 months. Compare the simple interest at a moneylender’s 5% a month and a bank’s 9% a year.
Working: 21,000 × 5% × 12; 21,000 × 9% × 12/12
Answer: moneylender ₹12,600, bank ₹1,890