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Chapter 3 Review Apply Proportionality to Percents 15 is 15% of what number? X = is of = = % 100 100 8 is what percent of 64? X = is of = = % 100 100 % What is 25% of 80? X = is of = = % 100 100 6% of 40 is what number? X = is of = = % 100 100 total cost =$ + meal =$ Tom went to lunch which cost $6.95 and will leave a 20% tip. What will be the total cost to the nearest cent? tip =$ tip total = = % 100 100 - discount =$ total cost =$ Jerry went to Sports World to buy a bat. The bat was priced at $30 with a 15% discount. Determine the sales price to the nearest cent. price =$ discount total = = % 100 100 written with cents Determine the simple interest paid to the nearest cent for each principal (p), rate (r), and time (t). interest =$ Interest = principal x rate x time I = prt principal = $1400 rate = 3.8 % time = 1 year (loan) x (decimal) x (years) Determine the simple interest paid to the nearest cent for each principal (p), rate (r), and time (t). interest =$ Interest = principal x rate x time I = prt principal = $628 rate = 5 % time = 4 months (loan) x (decimal) x 12 (years)
9 36 36 9.00 0.25 25 % Determine the percent of change. Round to the nearest whole percent. State whether the percent of change is an increase or decrease. 75-25 $75 to $25 difference original = original difference increase decrease % Chris estimated that would spend $250 on new summer clothes. She actually spent $350. What was the percent of change? Round the nearest whole percent. 350-250 difference original = original difference decrease increase % |