To arrange the given numbers in descending order, we first convert all fractions to decimals and then compare them.
- 0.7 is already in decimal form.
- 330.923 is already in decimal form.
- 1 2/5 can be converted to decimal:
- 1 2/5 = 1 + 2/5 = 1 + 0.4 = 1.4
- 17/20 can be converted to decimal:
- 17/20 = 0.85
Now we have the following decimal values:
- 0.7
- 330.923
- 1.4
- 0.85
Next, we will list them in descending order:
- 330.923
- 1.4
- 0.85
- 0.7
So, the numbers in descending order are: 330.923, 1 2/5, 17/20, 0.7.