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Proportions

Proportions. Jasmine Noel 3 rd Period Class May 3,2013. What are proportions?. Proportions are two ratios that are equal, and the cross products are equal. They are a simple way to show that two fractions are equal. Ways proportions could look.

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Proportions

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  1. Proportions Jasmine Noel 3rd Period Class May 3,2013

  2. What are proportions? • Proportions are two ratios that are equal, and the cross products are equal. • They are a simple way to show that two fractions are equal.

  3. Ways proportions could look • Proportions could be seen in ratios and fractions. 4:8 = 3:6 4 3 8 6

  4. How to solve a proportion A C • To solve a proportion, you must set it up as a fraction and cross-multiply to get your answer. B D

  5. Sample Problem 8 4 24 24 3 6 Because 8x3= 24 and 6x4=24

  6. How to set up a percent proportion • There is also another proportion called percent proportion. You must always put the part over the whole, and the percent[%] over 100. Part % 100 Whole

  7. percent proportion Sample Problem You cross-multiply 5x100 and you get 500. 5 % 20 100 Then you find the number times[x] 20 to get 500.

  8. Continued.. 20x25=500 5 25 20 100 Therefore, 25 will be the percent.

  9. Thanks For Watching!

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