The answer depends on the country (or region) whose currency you are working with. For example, the US has a 25 cent coin but not a 20 cent coin. The Eurozone has a 20 cent but not a 25 cent. Some countries have no coins smaller than 10 minor units.
Since you have not specified which country/region you are interested in, it is not possible to provide a more useful answer.
100x1p coins make a pound..
3 quarters 3 nickels and 10 pennies 25X3=75 5X3=15 1X10=10 75+15+10=100
To make 55 cents with 15 coins you will use 10 pennies, 1 quarter, and 4 nickles.
You can't make fractions of cents.
To make £2 using 2p coins, you would need 100 coins. This is because £2 is equivalent to 200 pence, and dividing 200 pence by 2 pence gives you 100.
100x1p coins make a pound..
3 quarters 3 nickels and 10 pennies 25X3=75 5X3=15 1X10=10 75+15+10=100
There are 100 pence (1p coins) in a pound. Therefore, it takes 100 1p coins to make a total of £1.
Easy. Use 100 5-cent coins.
To make 55 cents with 15 coins you will use 10 pennies, 1 quarter, and 4 nickles.
12 x 100/80 ie 15%
To make up 100 grams using Australian coins, you could use ten 10-cent coins, which each weigh 5.65 grams, totaling 56.5 grams. Alternatively, you could use four 20-cent coins (each weighing 11.34 grams), totaling 45.36 grams, and then add two 50-cent coins (each weighing 15 grams) to reach 100 grams. Various combinations of coins can achieve this weight, but these examples illustrate a couple of possibilities.
You can't make fractions of cents.
15
The US Mint did not make any 100 dollar coins in 1959.
Fifteen 50p coins.
Five dimes and ten nickels.