Study the following table, which shows the number of units of a product manufactured and sold by a company in five years, and answer questions

Years	Number of units (in thousands) Manufactured	Sold
2013	350	320
2014	375	315
2015	300	280
2016	450	423
2017	420	360

What percent of total units of the product manufactured in 2013 and 2015 is equal to the total units unsold during the five years? (correct to one decimal place)