The ratio of flour to water for making Indian rotis can vary depending on factors such as the type of flour used and personal preference. However, a common ratio that works well for making rotis is approximately 2 cups of flour to 3/4 to 1 cup of water. This ratio typically results in a soft and pliable dough that is easy to knead and roll out.
When using a kneading machine, you can start by adding the flour to the machine's bowl and gradually adding water while it's running. It's best to add water slowly and observe the consistency of the dough as it forms. If the dough feels too dry and crumbly, you can add a little more water, a tablespoon at a time, until the dough comes together. On the other hand, if the dough becomes too sticky, you can sprinkle a small amount of flour to adjust the consistency.
Remember that the humidity in your environment can also affect the dough, so it's important to adjust the water or flour accordingly if needed. The goal is to achieve a smooth and elastic dough that is easy to work with and produces soft and fluffy rotis.