# Test Wednesday! Study!. Percent: Is a ratio in which the first term is compared to 100. Discount: The amount to be taken off the original price. Principal:

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Test Wednesday! Study!

Percent: Is a ratio in which the first term is compared to 100. Discount: The amount to be taken off the original price. Principal: An amount of money borrowed or loaned. Interest: A charge for the use of money, paid by the borrower to the lender. Simple Interest: Interest paid only on the principal

Describe the shaded region as a fraction, decimal and percent. 38 = X 100 X=38% 38 =.38 100

Describe the shaded region as a fraction, decimal and percent. Fraction:______ Decimal:______ Percent: ______

*Change the percent to a fraction that can easily be divided into the whole number. Ex. 80% of 40 is ____. 4 × 40 = 32 5 10%20%33 1/3% 40%50%60%66 2/3% 75%80% 1 10 1515 1313 2525 1212 3535 2323 3434 4545

1.) 20% of 50 2.) 25% of 60

*Change the percent into a fraction. Then change the whole number into one that can be easily divided by the fraction. Ex. 71% of 62 70% of 60 70 × 60 = 42 100

1.) 42% of 367 2.) 34% of 55

*Remember that the “Of” number goes on the bottom. Is of Ex. 19% of 184 19 = X 100 184 X=34.96 19% of 184 is 34.96.

Ex 2- 32% of _____ is 57.6. 32 = 57.6 100 X 32X=5,760 X=18032% of 180 is 57.6.

1.) 25% of 16 2.) 55% of 750 3.) 64% of _____is 208. 4.) 28% of _____is 43.4

*Find the percent of a number. Tax-add it back to the original number. Discount-subtract it from the original number.

Kyung wants to buy a skirt from Hollister for \$47.50. it is discounted 20%. What is the end price of the skirt? 20% of \$47.50 \$47.50-9.50=\$38.00 20 = X 100 47.50 100X=950X=\$9.50 (discount)

Michael wants to buy a shirt from Zumez for \$36.99. The sales tax is 5%. What is the end price? 5% of \$36.99\$36.99+1.85=\$38.84 5 = X 100 36.99 100X=184.95X=\$1.85 (Sales tax)

1.) Noa wants to buy a pair of earrings for \$14.95. The earrings are discounted 10%. What is the end price?

2.) Ross wants to buy the new Mortal Combat video game at Gamestop for \$59.99. The sales tax is 6.5%. What is the end price?

X = Difference between two amounts 100 Original Number Ex. Izzi wants to buy a pair of shoes that originally cost \$48. The shoes are on sale and now cost \$35. What is the percent decrease? \$48-35=13 X = 13 100 48 48X=1300X=27.1%

1.) There are 14 people in class on Tuesday. There are 20 people in class on Wednesday. What is the percent increase?

2.) Ms. Nelson also works at Express and receives a store discount. She bought a \$75 skirt for \$60. What is the percent decrease?

Interest = Principal × Rate × Time I = P × r × t Total =Principal +Interest T=P+I

Ex. Megan borrowed \$12, 000 for 1 year at a simple interest rate of 6.75% per year. Find the amount of interest and the total amount. I=P×r×t T=P+I I=12,000×.0675×1T=\$12,000+810 T=\$12,810 I=12,000×6.75×1 100 I=\$810

1.) Carrington invests \$15,000 for 8 years at a simple interest rate of 6.75% per year. Find the amount of interest and the total amount.

2.) Jacob invests \$850 at a simple interest rate of 5.5% per year for 5 years. Find the amount of interest and the total amount.

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