Which is the least .105 0.501 0.015 0.15

The least is 0,015

hope this will help you 

To figure out the least we have to look at the tenths place
(the number to the right of the decimal)
Well lets take a look
0.105
0.501
0.015
0.15 

Within the bolded numbers, which one is the least?
That would be 0.015 <- see?

So the answer is 0.015 

Good luck! :)