Mrs Lim pours some cereal into two bowls. The ratio of the mass of cereal in Bowl A to the mass of cereal in Bowl B is 9: 5. She transfers half of the cereal from Bowl A to Bowl B. What is the new ratio of the mass of cereal in Bowl A to the mass of cereal in Bowl B?

Since we have the ratio of mass of cereal in bowl A to bowl B as 9:5, a convenient starting point is to assume that the mass of bowl A is 9 and mass of bowl B is 5

If you transfer 1/2 of bowl A to bowl B

New mass in bowl A = 9 x 1/2 = 4.5 (4.5 less)

New mass in bowl B = 5 + 4.5 (4.5 added)
= 9.5

New ratio = 4.5:9.5

As a fraction: 4.5/9.5 = 45/95 = 9/19 by simplification

So new ratio is 9:19

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Mrs Lim pours some cereal into two bowls. The ratio of the mass of cereal in Bowl A to the mass of cereal in Bowl B is 9: 5. She transfers half of the cereal from Bowl A to Bowl B. What is the new ratio of the mass of cereal in Bowl A to the mass of cereal in Bowl B? ​

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Mrs Lim pours some cereal into two bowls. The ratio of the mass of cereal in Bowl A to the mass of cereal in Bowl B is 9: 5. She transfers half of the cereal from Bowl A to Bowl B. What is the new ratio of the mass of cereal in Bowl A to the mass of cereal in Bowl B?