Well that involves something known as the Change of Base formula. A logarithm is just an exponent. Lets say we want to find the base 2 logarithm of 32 method call would be logOfBase2 32 which is 5.
When its not convenient to rewrite each side of an exponential equation so that it has the same base you do the following.
Base to which the logarithm has to be computed. Log47log75 log77log45. Learn how to rewrite any logarithm using logarithms with a different base. If we let our new log base be a then we.