Or, easier yet, just quarter them and take one and a quarter every day.
you can buy 25 mcg and take both 100 mcg and 25 mcg pills together.
or with current 100 mcg pill take 1 and cut it to 2 halves to make 50 mcg. then take that 50 mcg during alternate days with 100 mcg. like
100 mcg - (100 mcg + 50 mcg) - 100 mcg - (100 mcg + 50 mcg) - 100 mcg and so on.