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→Method 3: Octal to Binary / Binary to Octal
''Binary to Octal''
# One octal number represents 3 binary numbers, so '''starting from right-side''', group binary digits into '''groups of 3 ''' (add leading zeros if necessary).
# Write (4)(2)(1) under <u>each</u> group of 3 binary numbers.
# Multiply the placeholders (i.e. '''0''''s and '''1''''s) by the corresponding '''(4)(2)(1) ''' for each group to obtain the octal number (refer to diagram of ''binary to octal'' conversion).<br><br>
''Octal to Binary''