Add -4/5 + (- 3/4). help me I do know what to do.
answered belos
Why is every time I posted a question you do not answer why, why
DrBob answered your question below just 12 minutes after you posted it.
http://www.jiskha.com/display.cgi?id=1234039493
To add the fractions -4/5 and -3/4, you need to find a common denominator and then combine the numerators.
Step 1: Find the least common multiple (LCM) of the denominators, which in this case is 20. The LCM of 5 and 4 is the smallest number that is divisible by both 5 and 4.
Step 2: To convert -4/5 into a fraction with the denominator 20, multiply both the numerator and the denominator by 4. You get (-4 * 4) / (5 * 4) = -16/20.
Similarly, to convert -3/4 into a fraction with the denominator 20, multiply both the numerator and the denominator by 5. You get (-3 * 5) / (4 * 5) = -15/20.
Now, you have -16/20 + (-15/20). Since the denominators are the same, you can simply add the numerators and keep the denominator unchanged:
(-16 - 15) / 20 = -31/20.
Therefore, the sum of -4/5 + (-3/4) is -31/20.