The answer would be "-3/8 + -1/10."
Simplify means to reduce so in this case we aren't solving the question we are reducing it into simpler terms.
![-(3)/(8) -(1)/(10)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/a8p8tjxnyaxits5ujw3ae0x4nytmb9h7gz.png)
According to the rules of KCC (Keep Change Change) you would have to turn the subtraction sign into a addition sign and make the positive 1/10 into a negative.
![-(3)/(8) +-(1)/(10)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/tfh6ei8xrztmmguqtm02gq7he0bn7sy4he.png)
The equation cannot be reduce no further therefore that would be your answer.
Hope this helps.