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→Method 3: Octal to Binary / Binary to Octal
# '''One octal number''' represents '''3 binary numbers''', so '''starting from right-side''', group binary digits into '''groups of 3'''<br>(add leading zeros if necessary).
# Write '''(4)(2)(1)''' under <u>each</u> '''group of 3 binary numbers'''.
# Multiply the placeholders value or "placeholder" (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''
