The ratio of numbers A and B is 0.3, and the ratio of numbers B and C is 0.4. What percentage is the number

The ratio of numbers A and B is 0.3, and the ratio of numbers B and C is 0.4. What percentage is the number A of the number C?

A ratio is the arithmetic operation “division”. From the ratio A: B = 0.3, we express the number A (to find the unknown dividend, you need to multiply the quotient by the divisor); A = 0.3 * B. From the ratio B: C = 0.4 we express the number C (to find the unknown divisor, you need to divide the dividend by the quotient); C = B: 0.4. Then the ratio of numbers A: C = 0.3 * B / B: 0.4 = 0.12. Therefore, A: C * 100% = 0.12 * 100% = 12%.
Answer: 12%.