prósentur

Prósentur is the Icelandic term for percentages. A percentage expresses a proportion or rate as a fraction of 100 and is commonly written with the symbol %. The singular form is prósenta, and the plural is prósentur. In practice, percentages are used to compare parts of a whole across different contexts.

Calculation: percentage = (part / whole) × 100. Part = (percentage / 100) × whole. Example: 38% of 250 = 95. If 20% of a class of 40 students passed, that is 8 students.

Applications: Statistics, finance, economics, demography, medicine, politics, and marketing use prósentur to express shares, rates, growth, and probabilities. Percent changes are computed as ((new − old) / old) × 100. Percentages allow comparison across groups and time, and they are a common way to present survey results, market shares, and interest or growth rates.

Common issues: confusion between percentage and percentage points, rounding errors, and misinterpreting small changes when the baseline is large. Converting between decimals and percentages requires moving the decimal point (multiply by 100 to convert a decimal to a percentage, divide by 100 to convert back).

Overall, prósentur provide a concise, scale-free way to express relative sizes and changes, making it easier to compare data across different contexts.