the segment. In this case, you add 32.5% and 25%, which equals 57.5%.

Continue plotting using the same procedure:

32.5%

+ 25.0% = 57.5%

(the

end

of

the

second segment)

57.5%

+ 20.0% = 77.5%

(the

end

of

the

third segment)

77.5%

+ 15.0% = 92.5%

(the

end

of

the

fourth segment)

92.5%

+ 7.5% = 100.0%

(the

end

of

the

fifth segment)

Figure 1-31.

Percentage protractor

Before proceeding with the lesson, take a moment and review the plotting

procedure used with a percentage protractor. You placed the "0" percent

graduation at the 12 o'clock position (which placed the 50% graduation at

the 6 o'clock position). You plotted the largest segment first, moving

clockwise.

The end of the first segment served as the start for the

second segment and so on.

You plot the segments largest to smallest

moving clockwise. The proof that you plotted correctly was that the last

or smallest segment ended at the "0" percent graduation. You used 100%

of the circle in your pie chart. If the last segment did not end at the

"0" percent graduation, you made a mistake, and you must recheck your

work.

(c) Plotting segments with a standard protractor. To plot the

segments using a standard protractor, you must determine the number of

degrees each segment uses.

Before you can determine the number of

degrees each segment uses, you must determine how many degrees of the

circle makeup 1% of the circle.

If you divide the total number of

degrees in a circle