Hoi!
To multiply two fractions, all you have to do is multiply the numerators and the denominators.
25/33 * 11/50
Numerators: 25 * 11
Denominators: 33 * 50
The initial answer is 275/1650, but these fractions both have a common factor, which is 25. (This is not the only common factor)
275/25 = 11 (I'm using a slash to indicate division)
1650/25 = 66
The new simplified fraction is 11/66, but both of these fractions still have a common factor, which is 11.
11/11 = 1
66/11 = 6
Your final answer is 1/6