paper
question makes no sense as is.. what are you asking?
250 as a percentage of 350 is 100*250/350 = 71.43% approx. It makes no difference whether that takes 5 months, 5 seconds or 5 millennia: the percentage is the same.
A number times a number is a factor times a factor and it makes a product. Number x number = factor x factor = product
Proportional
If you mean a serial number on some product, it depends on what the product is. Each company can makes serial numbers mean anything they want it too.
plastic
plastic
recyclying centers
Paper Products, as well as for the entire nation
Nitrogen
Insecta.
Hydrogen -1
Bacteria
Oxygen and silicon
african
if you mean largest percentage then the answer would be elephant and lions/cheetahs
Nitrogen, close to 80 %.