Answer:
775
Step-by-step explanation:
Step 1: Divide (509)10 successively by 8 until the quotient is 0: 509/8 = 63, remainder is 5 63/8 = 7, remainder is 7 7/8 = 0, remainder is 7 Step 2: Read from the bottom (MSB) to top (LSB) as 775. So, 775 is the octal equivalent to the decimal number 509 (Answer).