Question

8620 decimal to binary

Answer 1

Which part are you stuck at?

Answer 2

Write down the decimal number and continually divide by 2 to give a result and a remainder. The remainder is either a 1 or a 0.

8620 / 2 result 4310 remainder 0
4310 / 2 result 2155 remainder 0
2155 / 2 result 1077 remainder 1
1077 / 2 result 538 remainder 1
538 / 2 result 269 remainder 0
269 / 2 result 134 remainder 1
134 / 2 result 67 remainder 0
67 / 2 result 33 remainder 1
33 / 2 result 16 remainder 1
16 / 2 result 8 remainder 0
8 / 2 result 4 remainder 0
4 / 2 result 2 remainder 0
2 / 2 result 1 remainder 0
1 / 2 result 0 remainder 1
Read the remainders from bottom to top.
10000110101100

Answer 3

There is always the windows calculator as well to check your answer.
However the basic approach is to
Go to highest bit you can < decimal value
Subtract
Repeat the process and update decimal value.

When you get to decimals it's a bit different
2^-1 = .5
2^-2 = .25
2^-3 = .125
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