Express the Given Logarithm as a Sum And/or Difference of Logarithms

Multiple Choice

Express the given logarithm as a sum and/or difference of logarithms. Simplify, if possible. Assume that all variables represent positive real numbers.
- $\log _{15} \frac{7}{8}$

A) $\log _{15} 7 \div \log _{15} 8$
B) $\log _{15} 8-\log _{15} 7$
C) $\log _{15} 7+\log _{15} 7$
D) $\log _{15} 7-\log _{15} 8$