Answer:
0
Step-by-step explanation:
1. Find LCD
LCD=21
2. Convert all fractions to fractions with the LCD

3. Solve

Answer:
54
Step-by-step explanation:
The answer is: " 12 months " .
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Explanation:
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(129 − 45) / 7 = 84 / 7 = 12 mos.
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You mean 60%of 5 1/2? that makes more sense...
i would do it like this:

(60% is the same as

(so that there is no confusion, i've put it into an improper fraction
now we can multiply:





which is 3.3.
so 60% of 5 and a half is 3.3.