Fraction is one of questions' type which operating mode is similar to Fill in the blanks. You can adjust its basic setting like Fonts, the color of text, and the width of answer box, etc.
Create a question in Editing mode
During editing, some specific symbols you need to use will be shown on the toolbar on the top of the screen, like brackets '[ ]' , plus '+' , minus '-' , times '×' , divided by '÷' and equal to '='. The numbers inside brackets [ ] represent the answer.
If you want to enter a proper fraction or an improper fraction, press the fractional symbol
If you want to enter a mixed fraction, press the the mixed fractional symbol