At my own expense, I have leased time from the local Cray lab and submitted the problem to the operators there.
They report that yes, against all odds and appearances, 13.65 is indeed greater than 2.398.
If that's 2398 liters, it's already rounded to the nearest liter. If it's some other unit of measure, you should indicate what it is.
It is: 365+1000 = 1365
1365
11 321
292, as a percentage of 1365 is 100*292/1365 = 21.392% (to 3 dp)
2400
195
1365
The LCM is 30030.
1365
The LCM is 1365.
You multiply the decimal value by 100: 1365 x 100 = 136,500 %