Ireally don’t get this one mebr />

The recipe requires 1/3 cup of milk and 1/4 cup of water. The ratio of milk and water should not change even when the volumes of milk and water change.

For every 1/3 cup of milk, you need 1/4 cup of water.
For every 1 cup of milk, you need 1/4 × 3 = 3/4 cup of water.
{The ratio of milk and water does not change, when 1/3 cup of milk is multiplied by 3 to get 1 cup of milk, the 1/4 cup of water has to be multiplied by 3 as well in order to attain the same ratio}

Hope this helps! :)

Hi there! The answer is B. 3/4

Every 1 / 3 cup of milk requires 1 / 4 cup of water.
When we want to know the required amount of water for every entire cup of water, we first need to find out how to get this entire (1 / 1)cup of water. To have this amount of water, we must multiply by 3. Hence, we multiply both sides by 3. 

Every (1 / 3) * 3 =1 cup of milk requires (1 / 4) * 3 = 3 / 4 cup of water.