if its 1 number repeating (.22222) then u put it over 9.....2/9
if its 2 numbers repeating (.272727) then u put it over 99.....27/99
if its 3 numbers repeating (.234234234), then u put it over 999...234/999
so 0.4545 has 2 numbers repeating, u put it over 99......45/99