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40/100 reduced to 2/5
0.72/1.80 = 0.4 x 100 = 40 Therefore, 0.72 dollars or 72 cents is equal to 40 percent of 1.80 dollars or 180 cents.
40/100 = 2/5
A nickel is 5 cents. 40 nickels are worth 40*5 = 200 cents, or $2.
There are 20 nickels in 2 dollars. This is because each nickel is worth 5 cents, and there are 100 cents in a dollar. So, 2 dollars is equal to 200 cents, and when you divide 200 by 5, you get 20. Therefore, you would need 20 nickels to make 2 dollars.