How Convert A Binary 11001 To A Decimal?

You have to start at the first number on the right. In other words:
When using binary it mainly is saying yes or no, 1 meaning yes, and 0 meaning no.

11001=25

Breakdown:
1=2^4 or 16
1=2^3 or 8
0=none.. If 1 then it would be 2^2 or 4
0=none.. If 1 then it would be 2^1 or 2
1=2^0 or 1

now add the numbers and you get 25.

Each time you go up from your binary code you add 1 to the power.
It's always 2^x.

It is 25

It is 25.0 as a decimal.

1*2^4+1*2^3+0*2^2+0*2^1+1*2^0=25,so the answer os 25.0.