It's the indication of how much silver is in a coin or a piece of jewelery.
So for instance a 1977 Mexican Morales 100 peso coin weighs .89oz and is made of .720 Fine silver. that means there is .64oz of silver in the coin.
.89 X .720 = .6408
What is Composition Silver (.720)
I have a 1934 "un peso" silver 720 peso, what is it worth?
The 1955 Nederlands 1 g weighs 6.6 g and is of .720 silver composition.
it weights 16.66666667 grams and its content in silver is 12 grams. :) 16.6666667 X .720 = 12
720
1 × 720 = 720 2 × 360 = 720 3 × 240 = 720 4 × 180 = 720 5 × 144 = 720 6 × 120 = 720 8 × 90 = 720 9 × 80 = 720 10 × 72 = 720 12 × 60 = 720 15 × 48 = 720 16 × 45 = 720 18 × 40 = 720 20 × 36 = 720 24 × 30 = 720
multiply the weight of the coin in troy oz. times .720 (% of silver in the coin) times the price of silver at the moment, from <http://www.kitco.com>
720
5% of 720= 5% * 720= 0.05 * 720= 36
720^2 = 518,400
5% of 720= 5% * 720= 0.05 * 720= 36
5% of 720 = 5% * 720 = 0.05 * 720 = 36
15% of 720= 15% * 720= 0.15 * 720= 108