Percentage practice problems with shortcut tricks

Example 1  : Find 8 percent of Rs. 225. 8% of 225=8*225/100 2/25*225=18 Rs Example 2:  Express 20, as a percentage of 40. 20/40 *100 =50% Example 3: The population of town has increased from 50,000 to 60,000, find increased percentage? Increase in population= 60,000-50,000=10,000 Percentage increase= 10,000/60,000 *100 =100/6% Example 4: In a basket

How to improve calculation speed in Quantitative Aptitude and Data Interpretation

A Lot of students find Mathematics as a very difficult subjects as it involves mental exercise. Calculation speed plays very important role during competitive exams as lots of exams are based on speed test. Most of students are accustomed of using calculator during their graduation so they find difficult to calculate fast during competitive exams.