Use the form below to do your conversion.
Solution
Step1
Log129991=Log(9991) ÷ Log(12)
Log(9991)= 3.9996089589714
Log(12)=1.0791812460476
Log129991=3.9996089589714 ÷ 1.0791812460476
Ans=3.7061512823907
Step2
Alternatively, the logarithm can be calculated like this.