Concept:The difference in simple interest for two different rates over the same period gives the difference in rates.Explanation:Let the two rates be r1% and r2% per annum.Simple interest for 2 years on Rs. 5000 at rate r% is 1005000×r×2=100r.Difference in interests: ∣100r1−100r2∣=100∣r1−r2∣=50.Thus ∣r1−r2∣=10050=0.5%.Answer:The difference between the rates is 0.50%.