When you multiply a fraction by 1, the value does not change. It is like this for any number.
You end up with 1.
Fraction refers to the amount to the right of the decimal point (amounts of less than 1), so if you multiply any (positive) number by a fraction its value will be reduced.
The value of the fraction remains unchanged
The numerator changes sign.
When you multiply a number by 1, it stays the same. When you multiply a number by a number greater than 1, it increases. When you multiply a number by a number that is less than 1 (a proper fraction), it decreases.
You end up with 1.
Fraction refers to the amount to the right of the decimal point (amounts of less than 1), so if you multiply any (positive) number by a fraction its value will be reduced.
You will get an equivalent fraction.
It stays the same.
You get an equivalent fraction which is not in its reduced (or simplest) form.
The value of the fraction remains unchanged
Nothing, there is no change, since you are multiplying by 9/9 = 1.
The 'flip' (the reciprocal) of the same fraction.
Your number increases.
The numerator changes sign.
You could multiply the fraction by -1.
Multiply the fraction by 1/3