A Common Mistake: Incorrect use of the subtraction key and negative number key
The subtraction key (circled in red) and the negative number key (circled in green) have different meanings!
In this case, the
negative
symbol should have been used in front of the 7.3 rather than the
subtraction
symbol.
The screen to the right shows the correct entry on top and the entry containing the mistake below it.
The next screen shows you how to correct formulas.
