Convert to binary140

 To convert the decimal number 140 to binary, you can use the division-by-2 method. Here's how it works step by step:

1. Divide the number by 2. 2. Write down the remainder (it will be either 0 or 1). 3. Divide the quotient by 2. 4. Repeat the process of dividing by 2 and noting the remainder until the quotient becomes 0. 5. The binary number is the sequence of remainders read from bottom to top.

Let's apply this method to the number 140:

``` 140 ÷ 2 = 70, remainder 0 70 ÷ 2 = 35, remainder 0 35 ÷ 2 = 17, remainder 1 17 ÷ 2 = 8, remainder 1 8 ÷ 2 = 4, remainder 0 4 ÷ 2 = 2, remainder 0 2 ÷ 2 = 1, remainder 0 1 ÷ 2 = 0, remainder 1 (stop as the quotient is now 0) ```

Now, write down the remainders in reverse order (from the last division to the first): 10001100.

Therefore, the binary representation of the decimal number 140 is 10001100.