Navratri fast is observed by people for seven or eight days, depending upon when they want to conduct the Kanchika Pujan on Ashtami or Navmi tithi.
The devotees would get up early in the morning, take bath and offer prayers to the deity. People should follow a specific diet for Navratri, if they haven't observed a nirahar (waterless) fast. If you are unable to observed nirahar fast, you can perform partial fasting. In partial fasting devotees avoid eating non-vegetarian food, alcohol and those dishes that are made of common salt or any kind of spice during Navratri vrat. Kuttu ka atta should be used to prepare rotis or puris, for the fast.
The Devotees may drink beverages like tea, coffee and milk, on Navratri. Dishes made of sago and potato is generally consumed by the people, during the Navratri. Sendha namak (rock salt) is used instead of common salt, for cooking on the festival. All fruits and foodstuff made of fruits are eaten during the seven days.
After seven days of fasting, devotees would break their fast on the eighth day - Ashtami - by worshipping Devi and offering prasad to the nine young girls and one boy. As per the tradition, puris (deep fried Indian bread), halwa (sweet dish made of suji) and Sabji are served to the young girls, called upon by the people who have observed fast. After seeking the blessings of the young girls, the devotees would break their fast by consuming the prasad (puri, halwa and sabzi) that they have prepared for them. While this is the tradition followed by majority of people, Navratri fast is also broken on ninth day (Navami), wherein the fast is observed until Ashtami. The same procedure is followed in that case as well.