Mathematics for IGCSE & O level - Using A Calculator (Section 2 - No. 16)
Which of the following are key to remember when entering fractions in the calculator?
Make sure the decimal is in the correct form.
Press the fraction key.
Make sure the whole number goes first.
Remember the order of operations.
Explication
To correctly enter fractions, the fraction key must be pressed, the whole number should be entered first, and the order of operations must be followed.