Use the form below to do your conversion.
Solution
Step1
Log21721=Log(721) ÷ Log(21)
Log(721)= 2.8579352647194
Log(21)=1.3222192947339
Log21721=2.8579352647194 ÷ 1.3222192947339
Ans=2.1614684312216
Step2
Alternatively, the logarithm can be calculated like this.