Question

I need help with question i went to a 81 to a 57 and know that i think about it i should have kept the 81 but PLEASE help me

Answer 1

Answer:

The = sign

Step-by-step explanation:

$\frac{7}{8} -\frac{9}{12} =\frac{1}{8}$

1/8 = 1/8

Answer 2

Answer: =

Step-by-step explanation:

$\frac{7}{8}-\frac{9}{12} ?\frac{1}{8}$

We need to find a common denominator for the two

which will be 24

But we need to multiply the numerators as well to change them.

$\frac{7}{8}(\frac{3}{3})-\frac{9}{12} (\frac{2}{2} )?\frac{1}{8}\\\frac{21}{24}-\frac{18}{24}? \frac{1}{8}\\\frac{3}{24} ?\frac{1}{8}\\Simplify\\\frac{1}{8} =\frac{1}{8}$