you search the LCD then you subtracted the top and left the bottom the same
Step-by-step explanation:
im not sure
If there counting man as students then its 16/22
If there not counting them as students then it 16/38
ANSWER
We need to add half the coefficient of
all square.

EXPLANATION
Given the equation,
.
We compare to the general equation,

This means that;

To complete the square we add, 
That is
.
Hence the number to be added to both sides is
.
Note that before we complete the square, the coefficient of the term in
must always be 1.