Answer:
To arrange the rational numbers in descending order, we can compare them and order them from largest to smallest. Let's start:
-7/-12 = 7/12
9/-10 = -9/10
Now, we have the following rational numbers:
2/5, -1/4, 7/12, -9/10
To compare these fractions, we can find a common denominator and then compare the numerators.
The common denominator for 5, 4, 12, and 10 is 60.
Converting the fractions to have a denominator of 60:
2/5 = 24/60
-1/4 = -15/60
7/12 = 35/60
-9/10 = -54/60
Now, let's arrange them in descending order:
-15/60, -54/60, 24/60, 35/60
Simplifying the fractions:
-1/4, -9/10, 2/5, 7/12
Therefore, the rational numbers in descending order are:
-9/10, -1/4, 2/5, 7/12.
Explanation:
Hehe sorry for no step by step explaination :(