Question

which of the following in not equivalent to 3 upon 7 (a) minus 15 upon - 35( B) part 15 upon 35 (C )6 upon 14 the minus (d) 9 upon 21​

Answer 1

Ll of them are equal to 3/7 . I think the question is wrong

Answer 2

Given :    -15 / -35   ,   15/35   ,   6/14   ,  9/21

To  Find : which of the given is not equivalent to 3 upon 7

Solution:

-15 / -35

= -5 * 3 / (-5 * 7)

cancelling - 5

= 3/7

15 / 35

= 5 * 3 / (5 * 7)

= 3/7

6 / 14

= 2 * 3 / (2 * 7)

= 3/7

9/21

= 3 * 3 / ( 3 * 7)

= 3/7

all fractions are equal to 3/7

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