Draw an obtuse angle big. place a point p inside the angle. now construct perpendiculars from the point to both sides of the angle. which side is closer to point p?

I have drawn three obtuse angles showing three different positions.

then taken a point p inside it.

Now to draw perpendicular from a point to a given line

we draw a line parallel fom that point to that given line.

After that from that point we draw perpendicular to that line.

Now the question arises which side is closer to point p ,

The answer is if length of perpendicular from p to the line is longer that side is farther from the point p , and if the length of perpendicular is shorter then that that line is nearer to point P.

The rate of changing between this year and last year is 21. If 54 of the students passed this year, but on;y 33 passed last year then the number of students decreased. All you have to do is subtract 33 from 54 which is 21. 
(54-33=21)