Use the form below to do your conversion.
Solution
Step1
Log217579=Log(7579) ÷ Log(21)
Log(7579)= 3.8796119070659
Log(21)=1.3222192947339
Log217579=3.8796119070659 ÷ 1.3222192947339
Ans=2.9341667622893
Step2
Alternatively, the logarithm can be calculated like this.