The dollar is, by definition, worth 100 cents. However, the value of the dollar changes over time due to inflation (or more rarely, deflation) and there are also different dollars in different countries, for example, the US dollar and the Canadian dollar, which do not have exactly the same value.
If you are refering to the value of the coin's composite metals then please state it in the question.
Inflation.
If you hold your 1852 $1 gold piece, it would worth more than $100 today Inflation continues to drastically decrease the value of a dollar. What you could buy for dollar in 1852 would cost you $27.60, meaning that dollar would be worth about 4 cents in today's world.
All nickels except "war nickels" from 1942-45 are made of copper-nickel, not silver. What you have is an ordinary coin worth 5 cents.
45 percent
anytime between 45 and 55.
45%
Inflation
Exchange rate considering the 45 cents is another country's currency and the dollar is referring to say the US dollar.
It means: "...compared to the value it had a certain number of years ago". So back then you could buy an item for 45 cents that you now would have to pay a dollar for.
Deflation
As of today 45/100 of a dollar or 45 cents
In all countries that use dollars and cents as their currency, $1 = 100 cents, so 45¢ = 45/100 of a dollar, or 45%.
45 cents
$1 = 100 cents → 45 cents/$1 = 45 cents/100 cents = 45/100 = 9/20
If you hold your 1852 $1 gold piece, it would worth more than $100 today Inflation continues to drastically decrease the value of a dollar. What you could buy for dollar in 1852 would cost you $27.60, meaning that dollar would be worth about 4 cents in today's world.
There are 100 cents in one dollar. Therefore, nine twentieths of a dollar is equal to 9/20 x 100 = 45 cents.
The 1943 steel cents are worth about 10 cents in circulated condition, or upwards of a dollar if it still has the original zinc coating. Then the '44 and '45 pennies are worth around 3 cents each. They're old, but not rare or valuable.
45 cents 1 nickel is 5 cents 9 x 5 = 45