-  Required Percentage = [ (130/(6.5 x 1000)) x 100]% = 2%.

To find what percent of 6.5 litres is 130 ml, we need to use the formula for finding percentages:

Percent = (Part/Whole) * 100

where "Part" is the amount we are interested in (in this case, 130 ml), and "Whole" is the total amount (in this case, 6.5 litres).

First, we need to convert 6.5 litres to millilitres, so we can compare it to the given 130 ml. We know that 1 litre is equal to 1000 ml, so:

6.5 litres = 6.5 * 1000 ml = 6500 ml

Now, we can use the formula to find the percent:

Percent = (130/6500) * 100 = 2%

Therefore, the correct answer is option B, 2%.

To summarize, when finding what percent one quantity is of another, we can use the formula:

Percent = (Part/Whole) * 100

And to convert between units, we can use conversion factors such as:

1 litre = 1000 ml.

If you think the solution is wrong then please provide your own solution below in the comments section .