Plz help I have been working on this problem for two days, I have watched videos. Can Somebody Explain and solve it? It doesn't really matter i just need help. (Question Below)

Fill in the table with the lowest terms fractions. To enter a mixed number, write it in the format 5 1/2. Note that there is a space between the whole number and fraction.

If m∠abc = 70°, what is m∠abd? justify your reasoning.  using the addition property of equality, 40 + 70 = 110, so m∠abd = 110°.  using the subtraction property of equality, 70 − 30 = 40, so m∠abd = 30°.  using the angle addition postulate, 40 + m∠abd = 70. so, m∠abd = 30° using the subtraction property of equality.  using the angle addition postulate, 40 + 70 = m∠abd. so, m∠abd = 110° using the addition property of equality.