Percent and Proportionality Quiz

Sewing patterns recommend buying extra fabric in case of mistakes. Jessica bought 5 yards of fabric, plus 20% extra fabric. Derek bought 3 yards of fabric, plus 25% extra. Who bought more fabric? How much more?

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Lou and Jacob each sold 200 pieces of jewelry. If 20% of Lou’s sales were rings, and Jacob sold 35 rings, who sold more rings? How many more?

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Elsie bought a video game for $85.00. If the store charges 170% of what it paid for the game, how much is the store’s profit?

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Fill in the blanks with the correct percent that represents each situation. Katrina made 4 of her last 5 shots. __________

Fill in the blanks with the correct percent that represents each situation. Miguel runs faster than his 19 teammates. What percent of the team is slower than Miguel? __________

Fill in the blanks with the correct percent that represents each situation. Fifty of 150 students wear school spirit T-shirts. __________

Fill in the blanks with the correct percent that represents each situation. Micah saved $6 on a $40 pair of pants. __________

If you know that 84 is 70% of the whole, how can you use proportional reasoning to determine the whole?

• A. 70/100 shows 70% as a ratio. The ratio 84/x compares 84 to the whole, x. These ratios must be equal, so write an equation and solve for x: x = 120.

• B. 70/100 shows 70% as a ratio. The ratio 84/x compares 84 to the whole, x. Multiply these ratios to find x: x = 58.8.

• C. 70/100 shows 70% as a ratio. The ratio x/84 compares 84 to the whole, x. These ratios must be equal, so write an equation and solve for x: x = 58.8.

• D. 70/100 shows 70% as a ratio. The ratio x/84 compares 84 to the whole, x. Multiply these ratios to find x: x = 120.

A restaurant bill comes to $120, and you decide to leave a 15% tip. How much do you leave as a tip?

• $18

• $15

• $20

• $25