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 calculate the 9's complement of a decimal number, subtract each digit from 9.

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

The 9's complement of 782 is 217. 

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

Therefore, the 9's complement of 782.54 is 217.45. 

The correct answer is (1) 217.45.