Answer:
-3 1/24
Step-by-step explanation:
First, find common denominators. The denominator needed for both of the fractions is 24.
Multiply the numerator by the amount you multiplied to get your denominator to 24.
-21/24 - 2 4/24
Second, subtract both of your fractions:
-21/24 - 2 4/24
= -3 1/24
-3 1/24 is your answer in simplest form.
