to divide fractions, you flip the last fraction and multiply
So its really:
25/46 times 69/40
Then you just mulitply the tops together, and the bottoms together. Doing that gives you:
1725/1840
Since these are pretty big numbers, you can simplify by taking their greatest common factor (the biggest number they are both divisible by.) and dividing both numbers by it. The greatest common factor is 5.
345/ 368
You may want to check other numbers to see if they divide into each number and as a decimal you would get 0.9375