Problem:

Converting the decimal fractions in List1 to fractions of four, where each quarter is the equivalent of one decimal unit (tenth).

Solution 1:

Use the INT function as shown in the following formula:
=INT(A2)+((A2-INT(A2))*4)/10

Solution 2:

Use the DOLLARFR function as shown in the following formula:
=DOLLARFR(A2,4)