We are going to start tutorials on the quantitative section with the very basics. In this tutorial you will dive straight into arithmetic and the unsung heroes of the GMAT, fractions. Now we all remember fractions from school, denominators, numerators, improper, mixed etc. If you didn't already know here is the bad news. And this is where fractions come into their own.
Fractions are quicker and more accurate to manipulate by hand than decimals.
To prove the point lets do an example. Try to repeat the calculation yourself. Also, there are many calculations to do and each one of those introduces the possibility of making a mistake. Add a zero here, forget a decimal point there, forget to carry the 2 somewhere else. An easier way Those of you who are real math whizzes will have spotted that 0.125 is a fraction in disguise.