Warmups x = 8 7 = 10 2 = n + 4 3 12 b + 5 5 8 n – 4.

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Presentation transcript:

Warmups x = 8 7 = 10 2 = n + 4 3 12 b + 5 5 8 n – 4

4 - 4 Percents Objective: To convert ratios to percents and to solve word problems involving percent.

Move decimal 2 places to the left. Example 1 Write 5/8 as a percent. Then write it as a decimal. 5 = x 8 100 8x = 500 8 8 x = 62.5% percent 62.5% Move decimal 2 places to the left. .625 decimal

Patterns Percent to decimal move decimal two places to left Decimal to percent move decimal two places to right Try on your own (TOO) Write as a percent and a decimal: 6/20 9/5 2/25 Answers: 30% .30 180% 1.80 8% .08

Word Problems Thirty five is what percent of 70? is 35 = x of 70 100 70 70 x = 50 Cross multiply!

Examples 3 & 4 What number is 25% of 56? Six is what percent of 15?

TOO with a partner Twelve is 16.6% of what number? Find 81% of 32. Answers: 72.3 25.92

Homework Percents Practice Worksheet

Speaker and Scribe Listen closely for directions 

Speaker and Scribe

Speaker and Scribe

Speaker and Scribe

Speaker and Scribe

Speaker and Scribe