90 !
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To find 3 fifths of 450, you first need to calculate what one-fifth of 450 is. To do this, you divide 450 by 5, which equals 90. Then, you multiply 90 by 3 to find 3 fifths of 450. Therefore, 3 fifths of 450 is 270.
One fifth plus one fifth is two fifths (2/5).
one fifth
1/10 of 4500 = 450
Divide by ten. One tenth of 450 = 45.