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Intro to Percents

The content provides a comprehensive guide on understanding and converting percents, decimals, and fractions, essential for GRE exam preparation.
  • A percent is fundamentally a fraction or a number divided by 100, originating from the Latin term 'per centum'.
  • Converting between percents and decimals involves moving the decimal point: two places to the left for percents to decimals, and two places to the right for decimals to percents.
  • To change percents to fractions, place the percent over 100 and simplify; for fractions to percents, convert the fraction to a decimal, then move the decimal point two places to the right.
  • Understanding the conversion between fractions and decimals is crucial for changing fractions to percents accurately.
  • Approximating percents from fractions or division is a valuable skill, involving strategic multiplication to get a close estimate.
Understanding Percents
Converting Percents and Decimals
Converting Percents and Fractions
Approximating Percents from Fractions