Because the proportion of dissolved substances in seawater is such a small number, oceanographers typically express salinity in parts per thousand.
On average, seawater in the world's oceans has a salinity of ~3.5%, or 35 parts per thousand.
Freshwater has a salinity of .005 percent or less.
Expressed as a decimal fraction, 7 percent of 3000 is equal to 0.07 x 3000 = 11.538461 recurring (that is, 11.538461538..)
A percentage is expressed as a decimal. 100% would be expressed as 1.0 3% (3/100) would be expressed as 0.03 3% of 10,000 = 0.03 x 10,000 = 300
Percent composition is usually expressed as a percent by mass, but in the case of gases and vapors, it is often expressed as a percent by volume.
1.46 percent is expressed as 1.46%.
70% to 82%
freshwater
Expressed as a proper fraction in its simplest form, 16.33 percent is equal to 1633/10000 or one thousand six hundred and thirty-three ten thousandths.
Expressed as a proper fraction in its simplest form, 31.32 percent is equal to 783/2500 or seven hundred and eighty-three two thousand five hundredths.
The amount of salinity that there is in the sunlight zone is about 3.5 percent. About 90 percent of sea life also resides in this zone.
35.4 percent expressed as an decimal is 0.354