Tammy is correct in this case.
The equation -1/8 = -1/8 means that both sides of the equation have the same value, which they do.
The negative sign in front of the fractions means that they are less than zero. The fraction 1/8 means one divided by eight, which is a small quantity.
So, -1/8 means a small negative quantity and -1/8 means the same small negative quantity.
Therefore, Tammy's equation is true and both sides are equal.