Use the form below to do your conversion.
Solution
Step1
Log21515=Log(515) ÷ Log(21)
Log(515)= 2.7118072290412
Log(21)=1.3222192947339
Log21515=2.7118072290412 ÷ 1.3222192947339
Ans=2.0509511847556
Step2
Alternatively, the logarithm can be calculated like this.