Proportions TeacherTwins©2014.

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Proportions TeacherTwins©2014

Warm Up $3.64

Proportions Flippable

Proportion- two ratios that are equal. If two ratios are equivalent, they are said to be proportional or in proportion. How to determine if two ratios are equivalent: Simplify each ratio to see if they are the same. Find the common denominator for each ratio and see if they are the same. Find the cross products and see if they are same.

Yes, they both simplify to 2/7 Yes, they both simplify to 2/7 No, they do not simplify to the same fraction.

x = 15 X=4.8

yes no X=8.8 X=5

Closure Tell if the following ratios are proportional. Explain why or why not. 7 boys to every 13 girls. 2184 Boys to every 4056 girls. Yes, they are proportional, 2184 to 4056 is 7 to 13 when simplified.