Class 7 Maths : Interest calculation
20 Questions on Simple and Compound Interest 20 Questions on Simple Interest and Compound Interest Mathematics Practice Worksheet with Step-by-Step Solutions Topics Covered: Principal, Rate of Interest, Time, Interest Amount and Total Amount. Important Formulas 1. Simple Interest (SI) SI = (P × R × T) / 100 Total Amount = P + SI 2. Compound Interest (CI) A = P × (1 + R/100) T CI = A - P 3. Half-Yearly Compound Interest A = P × (1 + R/200) 2T 4. Quarterly Compound Interest A = P × (1 + R/400) 4T P = Principal | R = Annual Rate | T = Time in Years | A = Total Amount SECTION A: SIMPLE INTEREST (10 QUESTIONS) Q1. Find the Simple Interest and Total Amount. A person deposits ₹5,000 at 8% per annum for 3 years. Find the SI and total amount. Solution: SI = (P × R × T) / 100 SI = (5000 × 8 × 3) / 100 SI = ₹1,200 Total Amount = 5000 + 1200 Answer: SI = ₹1,200; Amount = ₹6,200 Q2. Find the Principal. A sum earns ₹900 as simple int...