Explanation

(c) To convert decimal to binary we divide progressively the decimal number by 2 and write 5down remainder after each division. The remainder taken in reverse order, form the binary number.
[table] 2 | 429-1 ; 2 | 241-0 ; 2 | 107-1 ; 2 | 53-1 ; 2 | 26-0 ; 2 | 13-1 ; 2 | 6-0 ; 2 | 3-1 ; | 1-0 [/table]
Hence, $BCD$ equivalent of 429 is 110101101.