How do you write 8.21 as a mixed number

If the class was going to get a class pet and 5 picked fish and 7 pick bird and 8 picked rabbits have many students were in the

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

Credit card a offers an introductory apr of 3.4% for the first three months and standard apr of 15.7% thereafter,