Use the form below to do your conversion.
Solution
Step1
Log25991=Log(991) ÷ Log(25)
Log(991)= 2.9960736544853
Log(25)=1.397940008672
Log25991=2.9960736544853 ÷ 1.397940008672
Ans=2.1432061718667
Step2
Alternatively, the logarithm can be calculated like this.