Answer :

4/10 plus 55/100

The LCD is 100

4/10 --> 40/100 so, 40/100 plus 55/100 = 95/100 Or Just 19/20


[tex] \frac{4}{10}~~if~we~~divide~~both~~of~~side~~with~~2~~\frac{2}{5} \\ \\ \frac{55}{100}~~if~~we~~divide~~both~~of~~side~~with~~5~= \frac{11}{20} \\ \\ \frac{2}{5} + \frac{11}{20} \\ \\ \frac{2.4+11}{20} =\boxed{\frac{19}{20}} [/tex]

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