To add the fractions -1/4 and -3/5, we need to find a common denominator. The common denominator of 4 and 5 is 20.
Converting -1/4 to have a denominator of 20, we get -5/20.
Converting -3/5 to have a denominator of 20, we get -12/20.
Adding -5/20 and -12/20, we get (-5 - 12)/20 = -17/20.
Therefore, -1/4 + -3/5 = -17/20.
−1/4+−3/5=
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