Please help, im giving out brainlist! question:
A gallon of milk cost $2.79 in the year 2000. In 2015, it cost $3.98. What is the percent of change of the gallon of milk from 2000 to 2015?

( round your answer to the nearest tenth)

don’t forget, ill be giving out brainlist to those that help, please don’t waste my points, thank youuu.

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.