Need to know how to grow a quantity by a percentage? Learn how. 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 (or just finish your homework or study for that next big test). With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to increase a number by a given percentage in math.
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How To: Calculate percent composition for chemistry

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How To: Find the Volume of Composite Figures (Also Called Composite Shapes)

How To: Divide small numbers by big numbers

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