That's easy let me help u the first thing is that u cant subtract fractions so what u want to do is change it to addition and the 2/2 to its reciprocal which is still 2/2 then just add 3/3+2/2 which is 2.:)
Well first add up all the numbers of marbles (which is 34 in total) and divide it by the number of black marbles. (which should give you 8/34) Then simplify the fraction and you should get 4/17
