Intro to Percents
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Percents and Ratios
Summary
The content provides a comprehensive guide on understanding and converting percents, decimals, and fractions, essential for SAT exam preparation.
- Percents are fundamentally fractions or decimals represented per 100, stemming from the Latin term 'per centum'.
- Converting between percents and decimals involves moving the decimal point two places to the left or right, depending on the direction of conversion.
- Changing percents to fractions is straightforward by placing the percent over 100, while converting fractions to percents may require converting the fraction to a decimal first.
- For exact conversions from fractions to decimals and subsequently to percents, knowledge of decimal equivalents is crucial.
- Approximating percents from fractions involves strategic multiplication to get a fraction with a denominator close to 100, facilitating easier conversion and estimation.
Chapters
00:00
Understanding Percents
01:16
Converting Percents and Decimals
04:07
Approximating Percents from Fractions