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One fifth of 90 can be calculated by dividing 90 by 5, which equals 18. This means that one fifth of 90 is 18.
90 !
18. to solve this, simply divide 90 by 5. multiplying a number by one fifth is the same as dividing by 5, so it is 18.
1 fifth of 90 = 90/5 = 90*0.2 = 18
One fifth plus one fifth is two fifths (2/5).
one fifth