Answer:
-3/25
Explanation:
Do you know how to multiply fractions?
Just multiply the tops and then the bottoms. Forget the signs for now.
So 2/5 x 3/10 goes like this:
(2 x 3)/(5 x 10) = 6/50
When they say "simplest form" they mean to simplify. Do you know what that means? It simply means that you can divide the top and the bottom by any factors they have in common.
If both numbers are even (as these are), it's to divide by 2 first. Then divide by 2 again if you can, as many times as you can:
(6 ÷ 2)/(50 ÷2) = 3/25
Can't divide by 2 anymore.
The top we can divide by 3, but does 3 go evenly into 25? No, so we're done.
Now we have to deal with the signs. I assume you know the rules about that? Essentially it's this (when multiplying only 2 numbers): if the signs are the same, the result is positive. If they're different, the result is negative.
The signs here are different, a negative multiplying a positive, so the result must be negative.
And the answer is -3/25.