Use the form below to do your conversion.
Solution
Step1
Log219715=Log(9715) ÷ Log(21)
Log(9715)= 3.9874428049358
Log(21)=1.3222192947339
Log219715=3.9874428049358 ÷ 1.3222192947339
Ans=3.0157197227546
Step2
Alternatively, the logarithm can be calculated like this.