Question

What will be the output, if we compute the 9's complement of the decimal number 782.54?

• A. 216.54
• B. 217.45
• C. 215.45
• D. 216.45

Hint:

To calculate the 9's complement of a decimal number, subtract each digit from 9. For decimal numbers, do the same for each digit after the decimal point.

Answer 1

The Correct Option is A

 

Step 1: Understanding the 9's complement. 
To compute the 9's complement of a decimal number, subtract each digit from 9.

Step 2: Computing the 9's complement of 782.54. 
For the integer part \( 782 \), subtract each digit from 9: - \( 9 - 7 = 2 \) - \( 9 - 8 = 1 \) - \( 9 - 2 = 7 \) 

So, the 9's complement of 782 is 217. 

For the fractional part \( .54 \), subtract each digit from 9: - \( 9 - 5 = 4 \) - \( 9 - 4 = 5 \) 

Thus, the 9's complement of 782.54 is 216.45. 

Therefore, the correct answer is (1) 216.54.