Answer:
or 
Step-by-step explanation:

The opposite of
is 

Convert decimal number −0.75 to fraction
.
Reduce the fraction
to lowest terms by extracting and canceling out 25.

Least common multiple of 4 and 5 is 20. Convert
and
to fractions with denominator 20.

Since
and
have the same denominator, add them by adding their numerators.

Add -15 and 8 to get -7

Convert decimal number 0.4 to fraction
. Reduce the fraction
to lowest terms by extracting and canceling out 2.

Least common multiple of 20 and 5 is 20. Convert
and
to fractions with denominator 20.

Since
and
have the same denominator, add them by adding their numerators.

Add -7 and 8 to get 1.

Least common multiple of 20 and 4 is 20. Convert
and
to fractions with denominator 20.

Since
and
have the same denominator, subtract them by subtracting their numerators.

Subtract 15 from 1 to get -14.

Reduce the fraction
to lowest terms by extracting and canceling out 2.
or 
Hope this helps! Brainliest would be much appreciated! Have a great day! :)