Use the form below to do your conversion.
Solution
Step1
Log21709=Log(709) ÷ Log(21)
Log(709)= 2.8506462351831
Log(21)=1.3222192947339
Log21709=2.8506462351831 ÷ 1.3222192947339
Ans=2.155955707602
Step2
Alternatively, the logarithm can be calculated like this.