Final answer:
To arrange the fractions in descending order, find a common denominator and compare the numerators.
Step-by-step explanation:
To arrange the fractions in descending order, we need to compare their values. One way to do this is to find a common denominator for all the fractions. In this case, we can use the denominators 3, 8, and 5 to find a common denominator of 120.
Now, we can convert each fraction to an equivalent fraction with a denominator of 120:
- 2/3 = 80/120
- 7/8 = 105/120
- 3/5 = 72/120
Comparing the numerators, we can see that 105/120 is the largest fraction, followed by 80/120, and then 72/120. Therefore, the fractions in descending order are 7/8, 2/3, and 3/5.