I think it is c.75 because if it is in 6 as whole and the part is 2 then you make it as a fraction which will be 2/6 they both divide in to two so you divide that which gives you 1/3 divide 1over3 and you get 3 so the percentage can be like 25% 50%or 75% and since you have there you get 75% as your answer