Texas Instruments TI-80 User Manual - Page 74

Converting Decimals and Fractions úFRAC 8DEC 8FRAC (convert to fraction, FRACTION, item 4) converts a decimal value to its fraction equivalent and displays it. The decimal may be a number, expression, or list. In MANSIMP mode, 8FRAC first attempts to return a fraction in terms of 10ths, 100ths, or 1000ths. If this is not possible, 8FRAC converts the decimal to its fraction equivalent as it would in AUTOSIMP mode. If the value cannot be converted or if the denominator of the equivalent fraction is greater than 1000, the decimal equivalent is returned. The form of the 8FRAC result depends on the current fraction display format. For example, 1.25 8FRAC returns 1 1à4 if aÀbºc is selected or 5à4 if bºc is selected. If the decimal value for 8FRAC is a list, the list is displayed as fractions, but it is still stored internally in decimal form. 8DEC (convert to decimal, FRACTION, item 5) converts a fraction value to its decimal form and displays it. decimal8FRAC fraction8DEC AUTOSIMP & aÀbºc AUTOSIMP & bºc MANSIMP & aÀbºc MANSIMP & bºc Both 8FRAC and 8DEC are valid only at the end of an expression. A ! (§) instruction, however, can follow them. 3-10 Fractions