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 find answers to rational equation problems in algebra.
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How To: Remember "greater than" & "less than" symbols

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

How To: Find a number given Its percent

How To: Convert between diameter and radius

How To: Calculate the area of a parallelogram

How To: Do long division without a calculator

How To: Divide small numbers by big numbers

How To: Convert improper fractions to mixed numbers quickly

How To: Find the slope of a line given 2 points with fractions

How To: Find the Percent Given Two Numbers

How To: Figure out the domain & range of a piecewise function

How To: Calculate percent composition for chemistry

How To: Find and sketch the domain of a multivariable function

Find the discriminant (DELTA): quadratic equation

How To: Solve word problems involving domain and range

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

How To: Find outliers using the Zscore method

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

How To: Read a schoolbox ruler

How To: Calculate Faster Than a Calculator
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