how to get the value of antilog(-0.1071)?

The antilog of -0.1071 can be calculated as follows

Since -0.1071 is a negative number, therefore we will add and subtract 1 from this number, as the antilog of negative numbers cannot be calculated. So, we will have

-0.1071 = -0.1071 + 1 -1 = (1 - 0.1071) -1 = 0.8929 -1

Thus, we will look 0.8929 in the log table and multiply the answer by 10^-1 to account for the -1 characteristic. 

antilog (0.8929) = 7.814 X 10^-1 = 0.7814