Decimal numbers between 100 and 109 would be represented in BCD by the actual number + 156 (26*6). Numbers between 110 and 119 convert to BCD values of the actual number + 156 + 6.

To convert from decimal to binary, start by subtracting the biggest place value possible from the decimal number, then place a 1 in that place value column. Next, subtract the second biggest place ...