Learn to consider fundamental logarithms. Recall that the logarithm of a quantity say a to the bottom of one other quantity say b is a quantity say n which when raised as an influence of b provides a. (i.e. log [base b] (a) = n signifies that b^n = a). Thus, to guage logarithms, we both rewrite the expression as an exponential equation utilizing the definition of logarithm or consider utilizing properties of logarithms.