Which fraction is furthest from zero?
a)10/14
b)1/4
c)5/7
d)12/14

 [D]:  " 12/14 " .

Explanation:

          Looking at the answer choices given, we see that ALL of the fractions are "positive" fractions;  so the question is,
            →"Which fraction is the largest?"

            We see that for  choices "A)  "10/14 ; and D) "12/14" ;
 both have "14" as the denominator.

               Furthermore, we see that answer choice C):  "5/7" can be convert to "14th" ;

            →  5/7 = (5*2) / (7*2) = 10/14 ;  which is the same value as Answer choice, "A".

        We know that "answer choice: D):  "12/14" is larger than "10/14" ;  so we can  eliminate choices "A" and" C";

So, we are left with answer choices:  B)  1/4 ; and D) 12/14 ;


Answer choice B):  1/4 = ? / 28 ;   1/4 = (1*7) / (4*7) = 7/28 ;

Answer choice D):  12/14 = ? / 28;  12/14 = (12*2) / (14*2) = 24/28 ;

24/28 = (12/14) = (12÷2) / (14÷2) = 6/7 ;

                     → is much larger than 7/28 (= 1/4);

So, answer choice: [D]:  " 12/14 " ;  is the answer.

Answer: a. - n ( 0.7 + ( - 0.7 ) )