You multiply two halves, the equivalent of four, by four to get a product of 8 halves. Then add the "extra" half from the original "four and one half" to get nine halves.
Three-fifths is an equivalent fraction for nine-fifteenths. Another equivalent fraction for nine-fifteenths is eighteen-thirtieths or six-tenths.
4.50 = 4 1/2 or 9/2 (Nine halves)
If you multiply top and bottom by the same number, you get an equivalent fraction.
6 halves = 6/2 in fraction.
3/4
eighty-nine hundredths
3/4
2 and nine over twenty-five (the whole number two and the fraction nine twentyfifths)
5/3
3/4 j.A.r.
37/4