How do you evaluate #1- \frac { 4} { 7} + \frac { 3} { 5}#?

1 Answer
MysticSmile
Sep 13, 2017

#1 1/35#

Explanation:

#1-4/7=3/7#
Then, we do #3/7+3/5#.
In order to do that, we have to make the denominators of #3/7# and #3/5# the same. (Denominator is the bottom number.)
The closest multiple of #5# and #7# is #35# so we will use #35# as the new denominator.
#3/7 = 15/35# and #3/5 = 21/35#
#21/35+15/35=36/35#
Now we will change it to a mixed number.
#36/35 = 1 1/35#

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