SAT MATH Lesson 8. Drill Day 8 Eric must practice his clarinet for t minutes. After Eric practiced for d minutes, what percent of his practice did he.

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Presentation transcript:

SAT MATH Lesson 8

Drill Day 8 Eric must practice his clarinet for t minutes. After Eric practiced for d minutes, what percent of his practice did he not finish? A. B. C. D.E.

Fundamental Operations OperationProcedureExamples Change a Percent to a Decimal Divide the number by % = 14/100 = % = 5.6/100 = % = 145/100 = 1.45 Change a Decimal to a Percent Multiply the number by = x 100 = 31.5% 2.35 = 2.35 x 100 = 235% Change a Percent to a Fraction or mixed number Write the percent as a fraction in hundredths. Reduce the fraction if possible. 6% = 6/100 = 3/50 375% = 375/100 = 3 75/100=3 ¾ Change a Fraction or a Mixed Number to a Percent Using a calculator: 1 st divide the numerator by the denominator. Then change the decimal to a percent. Change 4 5/8 to a percent 1 st :divide 5/8 = nd :4 5/8 = rd : x 100 = 462.5%

Question 1 A car was on sale in November at 10% off the original retail price of $18,000.Due to slow sales, an additional discount of 15% was offered in January. What was the price of the car in January? A. $4,500B. $13,500C. $13,770 D. $15,147E. $15,300

Question 2 A child’s firetruck has two gear belts, one in front and one in back. When the front gear belt turns 5 times, the rear gear belt turns 8 times. If the front belt turns 800 time, what is the number of times the rear belt turns? A. 500B. 1,280C. 1,600 D. 4,000E. 6,400