Help me on 12, 13, 14, and 15

Answer:
Question 12:
1.625
Terminating
Question 13:
.833(repeating)
Question 14:
9m = 900cm
Question 15:
2.3mm = .23cm
Step-by-step explanation:
We can convert the mixed number into an improper fraction
Rule:
denominator * whole number + numerator
13/8
Divide 13 over 8
13/8 = 1.625
Divide 5 over 6
5/6 = .833(repeating)
There are 100 centimeters in one meter, to get to 9m in cm we'd multiply.
100 * 9 = 900cm
9m = 900cm
One mm is .1 cm, to get to 2.3mm in cm we'd divide by 10.
2.3/10 = .23
2.3mm = .23cm