Can you think of situations in which it might be preferable to compute with decimals rather than fractions or to compute with fractions rather than decimals, give examples of each situation and tell why you think that number form is preferable

Answer 1

It is better to use fractions when it is on top of other fractions, for example 2/3+2/4
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2/5-2/6
Because then you can get a common demoninator and cancel

For decimals I don't know pretty much everything else

Answer 2

A water tank will be drained at a constant rate of 42.4 liters per hour starting at 9:00 A.M. After one hour, the change in the amount of water in the tank can be represented as –42.4. Which of the following represents the total change in the amount of water in the tank by 9:00 A.M. the next day?