Answer :

-0.4 = -4/10 which is simplified to -2/5
Answer:

-0.4=-(2/5)

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0.4=0.1+0.1+0.1+0.1

=(1/10)+(1/10)+(1/10)+(1/10)

=(4/10)

=2/5

Therefore, -0.4=-(2/5)