Use the form below to do your conversion.
Solution
Step1
Log251991=Log(1991) ÷ Log(25)
Log(1991)= 3.2990712600274
Log(25)=1.397940008672
Log251991=3.2990712600274 ÷ 1.397940008672
Ans=2.3599519575674
Step2
Alternatively, the logarithm can be calculated like this.