2:1

Do you mean the ratio 2:1? Here are the basics and how to use it. - Meaning: For every 2 parts of substance A, there is 1 part of substance B. - Fractions of the total: A = 2 parts, B = 1 part, total = 3 parts. - A fraction = 2/3 ≈ 66.7% - B fraction = 1/3 ≈ 33.3% - If you know the total amount T of the mixture: - A = (2/3) T - B = (1/3) T - If you know A and want B: - B = A/2 (since A:B = 2:1) - If you know B and want A: - A = 2B - Example: If total is 90 units - A = (2/3)×90 = 60 units - B = (1/3)×90 = 30 units If you have a specific problem (numbers or context like mixing, solution, or proportions), share it and I’ll solve it step by step.