Definition: Percentage — Psychometric Glossary
A percentage expresses a proportion on a base of 100. Percentage calculations are ubiquitous in the mathematics section of the psychometric test.
- Definition and essential formulas
- Calculating variation, increase, and decrease
- Percentage exercises for the psychometric test
- Mental math tips to save time
What is a percentage?
A percentage is a way of expressing a number as a fraction of 100. The % symbol means 'per cent.' For example, 25% means 25 per 100, or one quarter.
Percentages are used to express proportions, variations, rates, and comparisons. They make data easier to understand by bringing everything to a common base of 100.
Percentages in the psychometric test
Percentage questions are among the most common in the math section. They may involve calculating a percentage, finding the base value, successive variations, or comparisons.
A classic trap involves successive percentages: a 20% increase followed by a 20% decrease does not return to the original value (it gives 96% of the original value).
Frequently asked questions
How to quickly calculate a percentage?
To calculate X% of Y: multiply Y by X and divide by 100. Tip: 10% = divide by 10, 5% = half of 10%, 1% = divide by 100. Combine these bases for quick calculations.
What is the formula for percentage change?
Change = ((New value - Old value) / Old value) x 100. For example, going from 80 to 100 represents an increase of ((100-80)/80) x 100 = 25%.
Are percentages difficult in the test?
Basic questions are accessible, but problems involving successive percentages or reverse percentages can be tricky. Regular practice on Hiku will help you master them.
Ready to get started?
Practice for free and prepare your psychometric test with Hiku.