A cake recipe calls for 1.5 cups of milk and 3 cups of flour. Seth made a mistake and used 5 cups of flour. How many cups of milk should he use to keep the amount of ingredients proportional?

2.5 cups of milk will make his ingredients proportional.

Step-by-step explanation:

Since he used five out of the three cups of flour he was supposed to use, you can use that as the fraction: 5/3.

Since 5/3 was used on the flour, it also has to be used on the milk

To apply it to the milk, you just multiply 5/3 × 1.5 cups of milk, which gets you 2.5 cups of milk

*Multiplying by a fraction also means of.

Example: 1/2 × 4 = 2 because two is 1/2 of 4

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step-by-step explanation: