From Ramanujan to calculus cocreator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps. With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to explain what a percentage is within the context of basic arithmetic.
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How To: Use ">" (greater than) and "<" (less than) symbols

How To: Calculate the area of a triangle using a basic formula

How To: Remember "greater than" & "less than" symbols

How To: Do long division without a calculator

How To: Calculate percent composition for chemistry

How To: Subtract a mixed number from a proper fraction in basic math

How To: Find the area of a triangle when given 2 sides & angle

How To: Find the coordinate of a point

How To: Find the Radius of a Circle from Arc Length

How To: Learn Calculus in 20 minutes

How To: Translate a sentence into math symbols

How To: Use a TI89 to calculate nCr

How To: Find the area of irregular shapes

How To: Calculate the acceleration of a car on inclined plane

How To: Do long division with decimals

How To: Find the Percent Given Two Numbers

How To: Convert Fahrenheit to Celsius with a formula

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How To: Find a slope of a straight line with: Ax + By + C = 0

How To: Identify characteristics of a sample during a survey
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