Yes it does: whenever you find an equivalent fraction.
Can you change a denominator
The denominator will change for some operations and not for others.
Multiply the numerator and the denominator by the same number and you can change it to whatever number you need.
Yes you have to add with the same denominator. when ever you do fractions they have to have the same denominator no matter what. So thats a yes
No.
The same way as with a positive denominator. The difference is, you change the sign of the numerator.
No.
First you get a common denominator, for example, 1/4 - 1/2 would be changed to 1/4 - 2/4 because what ever you do to change to denominator, you have to do the same with the numerator. Then you subtract the numerators and keep the denominator the same. Example: 1/4 - 2/4= -1/4.
for a fraction to a decimal, you divide the numerator by the denominator. 9/10=.90. for percent what ever the decimal is, the percent is. .76=%76
You divide the numerator by the denominator.
Divide the numerator by the denominator.
you divide the denominator by the numerator!