Decimal number 47 has to be subtracted from 3 So, 38−47=−9 We start with positive version of the number 1−91=9 In b it representation, binary form of 9 =00001001 1's complement =11110110 2’s complement =11110110         ‌‌+‌‌‌‌‌‌‌−         ––––––––         ‌‌11110111         ––––––––