SOLUTION: How do you solve 4/5-1/7?

Question 588630: How do you solve 4/5-1/7?
Found 2 solutions by Alan3354, stanbon:
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
How do you solve 4/5-1/7?
---------------
It's not solving, but you can subtract.
---
4/5-1/7
Find a common denominator. The product always works, 5*7 = 35
4/5-1/7 = 28/35 - 5/35
= 23/35

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
solve 4/5-1/7
To add or subtract fractions you have to
have them stated with the same denominator.
---
Your Problem:
The least common denominator is 5*7 = 35
---
Rewrite each fraction with that denominator:
4/5 = 28/35
1/7 = 5/35
------
Now you can subtract.
28/35-5/35
---
= 23/35
==================
A faster way to get the same answer is to cross multiply.
Your Problem:
4/5-1/7
= (7*4-5*1)/(5*7) = (28-5)/35 = 23/35
=========================================
Cheers,
Stan H.
=============
RELATED QUESTIONS
How do you solve... (answered by macston,josmiceli)
how do you solve... (answered by jim_thompson5910)
how do you solve 1 + 5 / (y-1) =... (answered by jorel1380)
how do you solve... (answered by rfer)
How do you solve... (answered by jim_thompson5910)
How do you... (answered by stanbon)
How do you solve {{{4/(m^2-7)=1}}}? (answered by oberobic)
how do you solve 7/8 +... (answered by MathLover1)
how do you solve 7^(x+4)=1? (answered by stanbon)