Use the form below to do your conversion.
Solution
Step1
Log21715=Log(715) ÷ Log(21)
Log(715)= 2.8543060418011
Log(21)=1.3222192947339
Log21715=2.8543060418011 ÷ 1.3222192947339
Ans=2.158723634702
Step2
Alternatively, the logarithm can be calculated like this.