15% of 40 greater than 25% of a number by 2. The number: MCQ with Answer and Explanation

Explanation:
(1.6N)/(0.8D) = 2N/D = 5/8 → N/D = 5/16. Wait, 2N/D = 5/8 → N/D = 5/16. That's option B. So I'll set correct B. But I have options: 3/8, 5/16, 5/12, 7/16. So B. I'll adjust options: A 3/8, B 5/16, C 5/12, D 7/16. So answer B.

Explanation:
SI for 3 years = 3250 - 2800 = 450, SI per year = 150. Principal = 2800 - 2×150 = 2500. Rate = (150/2500)×100 = 6%.

Explanation:
85% of 400 = 340.