When using chemical formula it is possible to calculate the percentage composition of the chemical. This can be useful when extracting metals from ores or when making fertilisers for specific plants.

Percentage Formula: Percentages are a fundamental concept in maths, used frequently in daily life. It represents parts of a whole as fractions of 100. They're symbolised by the "%" symbol.

Excel percentage formulas can get you through problems large and small every day—from determining sales tax (and tips) to calculating increases and decreases. We’ll walk through several examples below ...

As with metal ores, it is useful to be able to calculate exactly what proportion the essential nutrients accounts for in a fertiliser. Ammonium nitrate (NH 4 NO 3) is commonly used as a fertiliser.