Amy´s dog sleeps for 12 hours each night .She wants to know the percent of the day she sleep . What fraction shows the number of hours Amyś dog sleeps out of the total number of the hours in a day ? Complete the fraction

1/2

Step-by-step explanation:

What we must do is calculate the fraction of the hours of sleep with respect to the hours of a day.

We know that a day has 24 hours.

Now:

12 hours of sleep for the every 24 hours in a day, it would be:

12/24

Simplify to get 1/2

We know that 1/2 is equal to 0.5 or what is the same as he spends 50% of the time asleep.

Answer in simplified form is - 10 1/2 .

Step-by-step explanation:

We have given,

(5 1/4) ÷ (- 2 1/2)

This can be simplified as :

(5 1/4) ÷ ( -2 1/2)

Since 5 1/4 = 21/4  and -2 1/ 2 = -5/2

So we can write,

(5 1/4) ÷ ( -2 1/2) = 21/4 ÷ ( - 5/2)

or (21/4) / (-5/2)

or ( 21/4) * (-2/5)

or -42/20

or -21/10

or - 10 1/2 , this is the answer

Hence we get answer in simplified form as -10 1/2