Use the form below to do your conversion.
Solution
Step1
Log21155=Log(155) ÷ Log(21)
Log(155)= 2.1903316981703
Log(21)=1.3222192947339
Log21155=2.1903316981703 ÷ 1.3222192947339
Ans=1.6565570528988
Step2
Alternatively, the logarithm can be calculated like this.