Answer:
a. ![5 \frac{21}{40}](https://tex.z-dn.net/?f=5%20%5Cfrac%7B21%7D%7B40%7D%20)
b. ![\frac{1}{42}](https://tex.z-dn.net/?f=%20%5Cfrac%7B1%7D%7B42%7D%20)
Step-by-step explanation:
![a. \: 12 \frac{2}{5} - 6 \frac{7}{8}](https://tex.z-dn.net/?f=a.%20%5C%3A%2012%20%5Cfrac%7B2%7D%7B5%7D%20%20-%206%20%5Cfrac%7B7%7D%7B8%7D%20)
![\frac{62}{5} - \frac{55}{8}](https://tex.z-dn.net/?f=%20%5Cfrac%7B62%7D%7B5%7D%20%20-%20%20%5Cfrac%7B55%7D%7B8%7D%20)
![\frac{62}{8} \times \frac{8}{8} - \frac{55}{8} \times \frac{5}{5}](https://tex.z-dn.net/?f=%20%5Cfrac%7B62%7D%7B8%7D%20%20%5Ctimes%20%20%20%5Cfrac%7B8%7D%7B8%7D%20%20-%20%20%20%5Cfrac%7B55%7D%7B8%7D%20%20%20%5Ctimes%20%20%5Cfrac%7B5%7D%7B5%7D%20)
![\frac{62 \times 8 - 55 \times 5}{40}](https://tex.z-dn.net/?f=%20%5Cfrac%7B62%20%5Ctimes%208%20-%2055%20%5Ctimes%205%7D%7B40%7D%20)
![\frac{221}{40}](https://tex.z-dn.net/?f=%20%5Cfrac%7B221%7D%7B40%7D%20)
![5 \frac{21}{40}](https://tex.z-dn.net/?f=5%20%5Cfrac%7B21%7D%7B40%7D%20)
![b. \: \frac{3}{14} - \frac{4}{21}](https://tex.z-dn.net/?f=b.%20%5C%3A%20%20%5Cfrac%7B3%7D%7B14%7D%20%20-%20%20%5Cfrac%7B4%7D%7B21%7D%20)
![\frac{3}{14} \times \frac{3}{3} - \frac{4}{21} \times \frac{2}{2}](https://tex.z-dn.net/?f=%20%5Cfrac%7B3%7D%7B14%7D%20%20%5Ctimes%20%20%5Cfrac%7B3%7D%7B3%7D%20%20-%20%20%5Cfrac%7B4%7D%7B21%7D%20%20%5Ctimes%20%20%5Cfrac%7B2%7D%7B2%7D%20)
![\frac{3 \times 3}{42} - \frac{4 \times 2}{42}](https://tex.z-dn.net/?f=%20%5Cfrac%7B3%20%5Ctimes%203%7D%7B42%7D%20%20-%20%20%5Cfrac%7B4%20%5Ctimes%202%7D%7B42%7D%20%20)
![\frac{1}{42}](https://tex.z-dn.net/?f=%20%5Cfrac%7B1%7D%7B42%7D%20)
Hope it is helpful....
140-525 would be the range
Answer:
Bob could predict a <u>100%</u>, as if he has studied for a long time, and has learnt the content, he should be able to get 100%!
Answer:
The least common denominator is 306.
Step-by-step explanation: