SOLUTION: what number is halfway between-5/39 and -6/117?

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Question 1140935: what number is halfway between-5/39 and -6/117?
Found 2 solutions by ankor@dixie-net.com, josgarithmetic:
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
what number is halfway between-5/39 and -6/117?
:
39 * 117 = 4563 is the common denominator
585%2F4563 - 234%2F4563 = 351%2F4563 they have the same sign so we don't have to worry about that now
:
find half of 351%2F4563
351%2F4563 * 1%2F2 = 351%2F9126
add to 234%2F4563
234%2F4563 + 351%2F9126
Common denominator is 9126
464%2F9126 + 351%2F9126 = -815%2F9126 is half-way

Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
%28-5%2F39%2B%28-6%2F117%29%29%2F2

Note that 117 is a multiple of 3.

%28-5%2F39-2%2F39%29%2F2

%28-7%2F39%29%2F2

highlight%28-7%2F78%29