2006-09-21 13:18:54 · 9 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
4/5=28/35
4/7=20/35
answer 8/35
2006-09-21 13:21:14 · answer #1 · answered by Grev 4 · 0⤊ 0⤋
So you need to find a common denominator first. To do this you can just multiply each fraction by the denominator of the other fraction. So multiply the top and bottom of 4/5 by 7 which makes 28/35. Then multiply the top and bottom of 4/7 by 5 which makes 20/35. Now you can subtract them:
28/35 - 20/35 = 8/35
8 and 35 don't have any common factors, so the answer is: 8/35
2006-09-21 13:23:35 · answer #2 · answered by ineedalotofyou 2 · 0⤊ 0⤋
make yor denominator common to those fractions and the answer is 8/35.
How?
Multiply (4/5) for 7 = 28/35
Multiply (4/7) for 5 = 20/35
Now, your denominator is equal and u can make the substracion.
28/35 - 20/35 = 8/35
2006-09-21 13:24:32 · answer #3 · answered by Anonymous · 0⤊ 0⤋
4/5-4/7=25-20/35=8/35
2006-09-21 13:23:30 · answer #4 · answered by Rammohan 4 · 0⤊ 0⤋
4/5-4/7=
28/35-20/35=
8/35
2006-09-21 13:28:38 · answer #5 · answered by Anonymous · 0⤊ 0⤋
8/35
2006-09-21 13:20:51 · answer #6 · answered by BILL 6 · 0⤊ 0⤋
28/35-20/35=8/35
2006-09-21 13:33:22 · answer #7 · answered by jymde 1 · 0⤊ 0⤋
Find The LCD(Lowest Commen Denominator)
4..x (7)....28...........4 x (5).....20
------------=-----........ -----------=-----
5..x (7)....35 ..........7 x (5).....35
28......20.......8
---..-...---...=..---
35......35.......35
8/35 is already simplified.
2006-09-21 13:35:42 · answer #8 · answered by jdhunt84 2 · 0⤊ 0⤋
how old are you???
2006-09-21 13:25:53 · answer #9 · answered by micalou1735 2 · 0⤊ 0⤋