## Business Math For Dummies by Mary Jane Sterling

By Mary Jane Sterling

The fundamental table reference for each enterprise specialist or studentThis easy-to-understand source explains advanced mathematical thoughts and formulation and gives transparent examples of ways they relate to real-world company occasions. that includes useful perform difficulties to aid readers hone their talents, it covers such key issues as operating with percents to calculate raises and reduces, utilizing simple algebra to resolve proportions, and utilizing easy information to investigate uncooked facts. Readers also will locate strategies for finance and payroll purposes, together with interpreting monetary statements, calculating wages and commissions, and strategic wage making plans.

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**Example text**

Which approximates 1⁄3 but isn’t exactly the same. You don’t really notice the difference unless you’re dealing with large amounts of money or assets. Adding and subtracting fractions Fractions can be added and subtracted only if they have the same denominator. So before adding or subtracting them, you have to find equivalent values for the fractions involved so that they have the same denominator. qxd 28 5/27/08 9:32 AM Page 28 Part I: Reviewing Basic Math for Business and Real Estate Transactions fraction are the same multiple as the numerator and denominator of the other fraction.

Your math should look like this: 3 2=6 4$2 8 6+3=9 8 8 8 The sum of the two fractions, 9⁄8, is an improper fraction — it’s bigger than 1. So, you need to rewrite it as 11⁄8. To write an improper fraction as a mixed number, you divide the denominator into the numerator. The number of times that the denominator divides is the whole number, in front. The remainder goes in the numerator of the fraction that’s left. If you need to borrow from the whole number in order to subtract, you add the equivalent of 1 to the fraction.

Your math looks like this so far: 200 1 2x 2 = x + 30 400 1 = 2x 2 x + 30 1 ^ x + 30h = 2 ^ 2x h x + 30 = 4x Now solve the equation for the value of x. x + 30 = 4x -x -x 30 = 3x 30 = 3 x 3 3 10 = x Check to be sure that x does equal 10. By checking your answer to see if it makes sense, you’re more apt to catch silly mistakes. qxd 44 5/27/08 9:57 AM Page 44 Part I: Reviewing Basic Math for Business and Real Estate Transactions You can stop with the check at this stage, noting that both fractions are equal to 1⁄2.