Which is larger #3/7# or #13/40# ?
2 Answers
Oct 25, 2017
3/7
Explanation:
Rearrange so that they have the same denominator, then you can easily see which one is bigger.
7 isn't a factor of 40, so you will have to find their lowest common multiple.
The easiest way to do this is to multiply 7 by 40.
This gives 280.
Now multiply the top line by whatever you multiplied the bottom line:
=
Now you can see that
Oct 25, 2017
Explanation:
If
#a/b < c/d" "# if and only if#" "ad < bc#
So in our example, we find:
#3*40 = 120#
#7*13 = 91#
So:
#7 * 13 < 3 * 40#
and
#13/40 < 3/7#