How do you evaluate # - \frac { 4} { 5} - ( - \frac { 7} { 10} )#?

1 Answer
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Mar 10, 2018

#-1/10#

Explanation:

Find a common denominator, which is 10 in this case

#10/5# = 2 (Multiply the numerator 4 by 2 to get your new fraction, which is #(4*2)/10#)

#-8/10# #-# (#-7/10#) (#-7/10# becomes positive, because subtracting a negative number give you a positive)

#-8/10# +#7/10#

= #-1/10#

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