It is rational number because 2.20% is the same as 0.022 which as a fraction in its lowest terms is 11/500 and only rational numbers can be expressed as fractions.
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35% is rational
No. A rational plus an irrational is always an irrational.
rational
It is always irrational.
The product of a rational and irrational number can be rational if the rational is 0. Otherwise it is always irrational.