What do you add to 5 4/7 to make 7?

1 Answer
Nov 8, 2016

Answer:

#1 3/7#

Explanation:

Converting both #5 4/7# and #7# to improper fractions with a denominator of #7#
#color(white)("XXX")5 4/7 rarr 39/7#
#color(white)("XXX")7 rarr 49/7#

We are being asked for the value of #x# such that
#color(white)("XXX")39/7+x=49/7#

subtracting #39/7# from both sides
#color(white)("XXX")x=10/7#

or as a mixed fraction #x= 1 3/7#