In mathematics, a percentage is a number or ratio expressed as a fraction of 100. The application of the concept of percentages could be in preparing a breakfast batter with 30% grains and 70% cereals, or even the exact mix of essential fuel for rockets.
In the GRE quant section, questions involving percentages can appear in the following types of problems:
- Calculating discount / Successive discount
- Profit and Loss
- Mixtures and Alligations
- Simple Interest and Compound Interest
- Data Interpretations – Bar Graphs and Pie Charts
- Set Theory
So, mastering percentages can come handy in solving a lot of problems efficiently.
At Galvanize Test Prep, we recently conducted a webinar on percentages. In this webinar, the presenter shared a lot a quick tips on splitting a random percentage into parts of 1, 10, 25, 50, 100 percentages, and facts like a% of b = b% of a. Techniques like applying the steps in the ‘PIES’ mnemonics will help you crack percentages quickly and correctly. Students across India and abroad participated enthusiastically during this webinar and solved a few sample problems along with the presenter.
Here is the recording of the webinar on questions involving percentages in GRE Quant.