Why do I get incorrect answers with problems involving mixed fractions on FX115ES/FX300ES?
Be sure that you are entering the mixed fraction properly. Generally, when entering fractions, you’ll want to use the fraction key which is located underneath the [CALC] key and above the [(-)] key. Pressing this key allows you to enter a numerator and then a denominator. For mixed fractions, enter [SHIFT] followed by the fraction key. You can then enter three parts: the integer portion, then the numerator of the fraction, then the denominator of the fraction. One mistake that some people may make is to press the fraction key (without pressing [SHIFT]), then cursor left to enter the integer, then cursor right to enter the numerator and denominator. What happens is that is treated as the integer multiplied by the fraction, rather than the integer added to the fraction. For example, a user may enter 1 1/2 as: [Fraction] [cursor left] [1] [cursor right] [1] [cursor down] [2] [cursor right] This is incorrect, and is treated as “1 1/2” giving a result of 1/2. The correct way to enter 1 1/2
