Use the form below to do your conversion.
Solution
Step1
Log991=Log(91) ÷ Log(9)
Log(91)= 1.9590413923211
Log(9)=0.95424250943932
Log991=1.9590413923211 ÷ 0.95424250943932
Ans=2.0529806343171
Step2
Alternatively, the logarithm can be calculated like this.