:prealgebra, pre-algebra, number,
number conversion, convert number,
decimal, fraction, percent, percentage

:datatype, numeric

:operation, Fraction
operation, Decimal
operation, Percent

:<td align="left" style="text-align:center;" height="30" NOWRAP>Convert:
 <input type="text" name="formula" size="25" maxlength="100" value="$var_1"></td>
 <td align="right" valign="center" NOWRAP> to :
 $submit1
 $submit2
 $submit3

:18/7, 23/8, -4/37, 3.14159265, 2.718281828, 2.41421
