Octal Number System is one the type of Number Representation techniques, in which their value of base is 8. 

That means there are only 8 symbols or possible digit values, there are 0, 1, 2, 3, 4, 5, 6, 7. It requires only 3 bits to represent value of any digit. Octal numbers are indicated by the addition of either an Oo prefix or an 8 suffix.

In addition to binary, another number base that is commonly used in digital systems is base 16. This number system is called hexadecimal, and each digit position represents a power of 16. 

For any number base greater than ten, a problem occurs because there are more than ten symbols needed to represent the numerals for that number base.

How to convert octal to hexadecimal?

Using below the  two methods, we can convert the octal number system into the hexadecimal number system. 

1. Convert the octal number into binary and then convert the binary into hexadecimal.

2. Convert the octal number into decimal and then convert the decimal into hexadecimal.

Let's convert the octal number into the hexadecimal number system.

How to convert hexadecimal number into octal number?

Using the steps below we can convert the hexadecimal numbers to octal number.

1. REPLACE THE LETTER to it's equivalent number

 2. HEXADECIMAL TO BINARY. Next, we convert the hexadecimal number to binary.

 3. GROUP THE NUMBERS INTO THREE. After converting the hexadecimals numbers into binary, group it into three per set.

4. BINARY TO OCTAL. Then we can now convert the binary numbers to octal.

EXAMPLE: