C is 27/40. If you add it to 1/8 and simplify, you get 4/5.
<u />The greater change is represented by the absolute magnitude
|-34| = 34
|-67| = 67
67 > 34
<u><em>-67 represents the greater change</em></u>
I don't know man my teacher is gonna have to deal with me leaving this blank lol.
No. We claim that

and use algebra to prove the statement.
Let

. Multiply this by ten to get

. Subtract the initial equation to give

and divide by

to see that

. Substituting into the original equation gives

, proving the desired statement.
√25/4=5/2 because 5/2 times 5/2 equal 25/4. Hope it help!