Use the form below to do your conversion.
Solution
Step1
Log20139=Log(139) ÷ Log(20)
Log(139)= 2.1430148002541
Log(20)=1.301029995664
Log20139=2.1430148002541 ÷ 1.301029995664
Ans=1.6471678649964
Step2
Alternatively, the logarithm can be calculated like this.