One way of doing this is with 19 ten-cent coins and 10 one-cent coins.
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One way is if you have 20 pennies, 7 dimes, and 2 nickels.
Assuming that 5.80 is an amount expressed in dollars or euros (the two major currencies that have cents as their smaller denomination): There are 100 cents in each dollar/euro. Thus 5.80 of them is the same as 580 cents. (Move the decimal point 2 places to the right to convert.) Both quantities are now expressed in cents. Divide 580 cents by 20 cents and you'll get an answer of 29 coins.
$29 - 0.2($29) = $29 - $5.8 = $23.20
29% into decimal = 0.29Divide 29% by 100%:= 29%/100%= 29/100= 0.29or just move the decimal point two places to the left.
There are 29 ways.