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

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

How To: Use ">" (greater than) and "<" (less than) symbols

How To: Write a slopeintercept equation given an XY table

How To: Do long division without a calculator

How To: Find the Percent Given Two Numbers

How To: Find a number given Its percent

How To: Find the Slope Given 2 Ordered Pairs

How To: Find a missing coordinate given: coordinate & equation

How To: Find the area of a parallelogram using geometry

How To: Write a logarithm as a sum or difference of logarithms

How To: Write a sum/difference of logarithms as a logarithm

How To: Find the 100th term in a sequence

How To: Divide small numbers by big numbers

How To: Find a missing side of a triangle, similar to another

How To: Solve percentages without a calculator

How To: Find the area & perimeter of triangles & squares

How To: Calculate probability in "at least one" problems

How To: Find the coordinate of a point

How To: Find the length of a segment using the midpoint II

How To: Find the length of a median in a trapezoid
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