Answer :
Answeris 10 floor tiles. why? 2/5 = 4 tiles 1/10 = 1 tile 1/2 = 5 tiles. Add them up and you have your answer.
The answer would be 10 tiles because 1/2 is 5, 2/5 is 4 and 1/10 is 1. Add them all together to get an answer of 10.