A negative number divided by a negative number is positive. Therefore, it's the same as if both fractions were positive.
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When adding and subtracting unlike fractions, it is necessary to find a least common denominator. It's the same process as finding an LCM. You can simplify a fraction by finding the GCF of the numerator and denominator and dividing them both by it.
simplest form
28 in this case.
yes they do and fractions also represent divide like if you had 1/2 you would have half of a whole!
LCD is the Lowest Common Denominator which is the lowest number into which the denominators of all the fractions will each divide exactly. Each of the fractions can then be converted to an equivalent fraction with the new denominator which then allows the fractions to be added and/or subtracted.