Subtract:
9/10 - 5/8

Question

Subtract: 
9/10 - 5/8

jim_thompson5910 · Answer

what did you get?

anonymous · Answer

122/80 
because I used a equation that someone gave me on here but i think it only works with addition and multiplication

anonymous · Answer

you need to get a common demoninator right @jim_thompson5910

jim_thompson5910 · Answer

the LCD is 40, so get each denominator equal to 40

9/10 - 5/8

36/40 - 5/8 ... multiply top and bottom of the 1st fraction by 4

36/40 - 25/40 ... multiply top and bottom of the 2nd fraction by 5

I'll let you finish

jim_thompson5910 · Answer

yes that's correct ChelseaSweets

anonymous · Answer

ok hold on...

jim_thompson5910 · Answer

ok

anonymous · Answer

11/40

jim_thompson5910 · Answer

you nailed it

anonymous · Answer

yeah!!

jim_thompson5910 · Answer

and that's as reduced as it gets

jim_thompson5910 · Answer

since 11 and 40 have no factors in common (except for 1 of course)

anonymous · Answer

yea thanks for the help! I got like 3 problems left but there division

jim_thompson5910 · Answer

well to divide two fractions, you just flip the second fraction and multiply

jim_thompson5910 · Answer

ex:

1/2 divided by  2/3

turns into

1/2 times 3/2

anonymous · Answer

why did you flip the problem and change the / into *

jim_thompson5910 · Answer

because in general

(a/b) divided by (c/d)

turns into

(a/b) times (d/c)

jim_thompson5910 · Answer

to multiply any two fractions, you just multiply straight across

anonymous · Answer

ooo ok

anonymous · Answer

6/11 divided 12/13