Divide the decimal number by 2
Record the remainder
Divide the quotient by 2 again
Record each new remainder
Repeat until the quotient is 0
Read the remainders from bottom to top
The remainders form the binary number
Divide the decimal number by 2
Record the remainder
Divide the quotient by 2 again
Record each new remainder
Repeat until the quotient is 0
Read the remainders from bottom to top
The remainders form the binary number