The following table shows the number of students eurolled in a university for higher education in Liberal Arts and in Engineering from 2015 to 2018. Study the table carefully and answer the question that follows.
| Year | No. of students | |
| Liberal Arts | Engineering | |
| 2015 | 345 | 650 | 
| 2016 | 549 | 521 | 
| 2017 | 477 | 846 | 
| 2018 | 781 | 695 | 
The average number of students enrolled per year in Liberal Arts is how much more or less than that in Engineering from 2015 to 2018?