To find the sum of the fractions given, we first add 920 and 720.
920 + 720 = 1640
Now we need to check if it's presented as a simple fraction. The given options are:
- 45
- \(\frac{4}{5}\)
- 410
- \(\frac{4}{10}\)
- 1620
- \(\frac{16}{20}\)
- 1640
The number 1640 itself is not a fraction, but it is the sum of the two numbers we calculated.
So, the simplest form of the sum of the fractions is 1640.