First, find the total amount of liquid for a drink with 30 mls of orange juice Assume volumes can be added 30+20+50 = 100 ml the percentage/proportion of orange juice in the drink is the number of mls of orange juice divided by the total volume so 30/100 which can be reduced to 3/10
It would be less because when you multiply something by 1/2 you are basically dividing it by 2, finding half. So when you multiply 9 8/9 by 1/2 your product would be less than 9 8/9