Examples of Fraction Displays

The following table shows how the number 2.77 is displayed in the three fraction formats for two /c values.

Fraction

 

How 2.77 Is Displayed

 

Format

 

/c = 4095

 

 

/c = 16

 

 

 

Most Precise

2

77/100

(2.7700)

2

10/13

(2.7692)

Factors of Denominator

2

1051/1365

(2.7699)

2

3/4

(2.7500)

Fixed Denominator

2

3153/4095

(2.7699)

2

12/16

(2.7500)

The following table shows how different numbers are displayed in the three fraction formats for a /c value of 16.

FractionNumber Entered and Fraction Displayed
Format

2

 

2.5

 

2 2/3

2.9999

216/25

Most precise

2

2

1/2

2

2/3

3

2

9/14

Factors of

2

2

1/2

2

11/16

3

2

5/8

denominator

 

 

 

 

 

 

 

 

Fixed denominator

2 0/16

2

8/16

2

11/16

3 0/16

2 10/16

For a /c value of 16.

 

 

 

 

 

 

 

Rounding Fractions

If Fraction–display mode is active, the RND function converts the number in the X– register to the closest decimal representation of the fraction. The rounding is done according to the current /c value and the states of flags 8 and 9. The accuracy indicatior turns off if the fraction matches the decimal representation exactly. Otherwise, the accuracy indicatior stays on, (See “Accuracy Indicators” earlier in this chapter.)

In an equation or program, the RND function does fractional rounding if Fraction– display mode is active.