Hi there!
In order to see if each fraction is in its simplest form, we need to (try) to simplify it. To simplify a fraction, we need to find a whole number that both the numerator and the denominator can be divided by.
The answer is 9/16.
Both 9 and 16 can't be divided by the same whole number (and stay a whole number). So, it is the most simplified fraction.
Hope this helps!
