When multiplying fractions, just multiply the two top numbers (3x1), and the two bottom numbers (5x2), to get 3/10 (or 0.3). Simplest form just means to then reduce the resulting fraction - in this case it is already reduced. To be reduced, neither number can have a common factor. For instance, if it was 3/12, both numbers would have a common factor, and so the simplest form would be 1/4.
1/4 is in its simplest form.
1 over 11 is already in simplest form.
1/18 is in its simplest form.
3/8 * 1/12 ? multiply tops and bottoms = 3/96 = 1/32 (simplest form)
1/6 is the simplest form.
1/16 is in its simplest form.
1/20 is in its simplest form.
1/23 is the simplest form.
1/300 is in its simplest form.
1/660 is in its simplest form.
1/6 is in its simplest form.
1/22 is in its simplest form.