Pls help I have quiz on tuesday and I don't get this stuff...

How do I subtract...
1. 8/d - 3/d

2. 1 - 8/9

3 answers

1 - (8/9) = (9/9)-(8/9) = 1/9

(8/d) - (3/d) = ??
1. Since the denominators are the same, just subtract the numerators.

8/d - 3/d = 5/d

2. Change the whole number to a fraction.

1 - 8/9
9/9 - 8/9 = ?
so it will be 1 over 1 minus 8 over then I multiply them?