What is the answer -23/6-7/3

I thought I got it right but it said it was wrong.

Parks is wearing several rubber bracelets one third of the bracelets are tie dye 1/6 are blue and 1/3 of the remainder are camouflage if park swears to camouflage bracelets how many bracelets does he have on

How much dextrose 70% must be mixed with dextrose 5% to prepare 1,000 ml of dextrose 20%?

For what value of (y) is 3^3/3^y =1/9