10 5/12 written as an improper fraction is equivalent to 125/12
It would be 725/1000 because u are 3 spaces after the decimal
When you multiply a same number but with different powers, you can simply add the powers together. So, in your question, add the powers -1 and -7 together.
7^(-1) x 7^(-7) = 7^(-8)
When you divide a same number but with different powers, you subtract the power at the top with the power from the denominator. So, -8 - (-7) = -1.
7^(-8) / 7^(-7) = 7^(-1)
So your answer would be 7^(-1).
Hopefully my explanation was clear?
Step-by-step explanation:

Answer: 15
Step-by-step explanation:
3x5=15