the square root of 2 fifths of irrational is 0.565685425
Rational
It is a rational number.
Yes.
No.
Yes. Any number that can be written as one integer over a non-zero integer is a rational number. 2 3/5 = (2×5+3)/5 = 13/5 which is the form of one integer over a non-zero integer, thus it is rational.
Irrational
4/5 is rational. Rational numbers are numbers that can be written as a fraction. Irrational numbers cannot be expressed as a fraction.
yes because you can put it as a over b
Yes, 2 fifths is half of 4 fifths.
To my knowlage yes it very much is a rational number :D I sounded smart xD
Four-fifths. 2/5 + 2/5 = 4/5.