25.1 and 25.2 Percents, Decimals and Fractions p. 556 and 558 Introduction: Quick Review Objective: 1. To write ratios as percents and express parts of.

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25.1 and 25.2 Percents, Decimals and Fractions p. 556 and 558 Introduction: Quick Review Objective: 1. To write ratios as percents and express parts of a whole area as percents 2. Learn how to estimate and find a percent of a number Remember: when multiplying decimals numbers, move the decimal to the RIGHT for each power of 10 (i.e two powers of ten, move the decimal over TWO to the right:.2 =.20 = 20%) Glossary

Fraction to Percent: divide, move decimal to the right two spots (i.e. 1/5 =.20 = 20%) Decimal to Percent: multiply by 100, move decimal to the right two spots (i.e..20 = 20%) Percent to Fraction: write as a fraction over simplify (i.e. 20% = 20/100 = 1/5) Percent to Decimal: divide by 100, move decimal to the left two spots (i.e. 20% =.20) Fraction to Percent: divide, move decimal to the right two spots (i.e. 1/5 =.20 = 20%) Decimal to Percent: multiply by 100, move decimal to the right two spots (i.e..20 = 20%) Percent to Fraction: write as a fraction over simplify (i.e. 20% = 20/100 = 1/5) Percent to Decimal: divide by 100, move decimal to the left two spots (i.e. 20% =.20) Fraction to Percent: divide, move decimal to the right two spots (i.e. 1/5 =.20 = 20%) Decimal to Percent: multiply by 100, move decimal to the right two spots (i.e..20 = 20%) Percent to Fraction: write as a fraction over simplify (i.e. 20% = 20/100 = 1/5) Percent to Decimal: divide by 100, move decimal to the left two spots (i.e. 20% =.20)

25.3 Estimate and Find Percent of a Number p. 562 Introduction: Quick Review Objective: Learn how to estimate and find a percent of a number Glossary

Guided Instruction: Example 1: Finding the percent of a number 60% of 25 Josh played in ____ games.

Tip: _____ 15% of _____ Our Work (write 15% as a fraction or a decimal and multiply it with the total: 15/100 x $___ OR.15 x $____) : Tip: _____ 15% of _____ Our Work (write 15% as a fraction or a decimal and multiply it with the total: 15/100 x $___ OR.15 x $____) : 15% of _____ Our Work (write 15% as a fraction or a decimal and multiply it with the total: 15/100 x $___ OR.15 x $____) :

25.4 Discount and Sales Tax p. 568 Introduction: Quick Review Objective: to learn how to solve problems involving discounts and sales tax Vocab: discount= amount subtracted from the regular price SALE PRICE = regular price - discount! sales tax= percent of the cost of an item Glossary

Guided Instruction: Example 1: Discount - Volleyball set, $32 (25% off) 32 x.25 = _________ SALE PRICE = regular price - discount Discount = _________ and Sale Price = __________ Example 3: Sales Tax - Table tennis, $119 (5% sales tax) 119 x.05 = ___________ She paid ___________ in sales tax.

25.6 Simple Interest p. 538 Introduction: Quick Review Objectiv e : Learn how to find simple interest Vocab : principal= original amount put into a bank account simple interest= fixed percent of the principal paid yearly (formula: I = prt... I = interest, p = principal, r = interest rate per year, t = time in years ) Glossary

Guided Instruction: Example 1: Finding the simple interest ($500, 6%, 2 years) I = prt Katrina will earn ________ in interest.

RECAP : Match the vocab word with its definition I = interest, p = principal, r = interest rate per year, t = time in years amount subtracted from the regular price original amount put into a bank account percent of the cost of an item regular price - discount fixed percent of the principal paid yearly principal discount SALE PRICE sales tax simple interest rate I = prt