The percent of working students increased 12.2% to 32.9%, what was the percent prior to the increase?

When y’all answer can y’all explain too !

Answer! if you don’t mind, can you explain

Match the following reasons with the statements given to create the proof. 1. do = ob, ao = oc sas 2. doc = aob given 3. triangle cod congruent to triangle aob vertical angles are equal. 4. 1 = 2, ab = dc if two sides = and ||, then a parallelogram. 5. ab||dc if alternate interior angles =, then lines parallel. 6. abcd is a parallelogram cpcte