Unit 4 MSTAR-Style Practice Test — Form B

Understand and Use Percentages · 5 questions · English only, like the real test · No timer — take the time you need.

These are MSTAR-style questions written for this curriculum to rehearse the format. They are not official Maryland assessment items. MSTAR — Maryland's new state test, first given in spring 2027 — uses the same kinds of questions you see here: selected response, select-all, two-part evidence questions, and written responses.

How this works: Answer every question, then press Submit & Grade. Selected-response parts grade instantly with an explanation for each; written responses go to your teacher. Your answers save on this device.

On the real MSTAR: math runs as three 40-minute sessions, in English, on a computer. Here there is no clock — practice the thinking first; the pacing comes with rehearsal.

Written responses: how should the explain-the-error questions be scored?

Instant scoring checks whether your explanation states the value and uses the reasoning the question is about. It matches words and numbers, so a right answer worded differently can score low — your teacher can always re-score it from the answer key.

16.AT.4Understand Percent

Part A

A robotics club had a fundraising goal of $500. By Friday, they collected $750. What percent of their goal did they achieve?

50% 75% 125% 150%

Part B

Which explanation best supports your answer to Part A?

Subtracting $500 from $750 gives $250, and 250 is 75% of 500. Since $500 is half of $1,000, the percent must be 50%. The ratio 500 to 750 simplifies to 2 to 3, which is 125%. Dividing $750 by $500 gives 1.5, and multiplying 1.5 by 100 gives 150%, representing 1.5 times the original whole.

26.AT.4Relate Fractions, Decimals, and Percentages

Part A

What is the fraction 7/20 written as a decimal and as a percent?

0.035 and 3.5% 0.35 and 35% 0.35 and 3.5% 0.7 and 70%

Part B

Which mathematical reasoning justifies the conversion in Part A?

Multiplying both numerator and denominator by 5 yields the equivalent fraction 35/100, which equals 0.35 and 35%. Moving the decimal point in 7.20 one place left gives 0.72. Adding 15 to both terms gives 22/35, which equals 35%. Dividing 20 by 7 gives approximately 2.85, so the percent is 35%.

36.AT.4Estimate the Percent of a Number

Select all that apply

Select ALL benchmark percent strategies that correctly estimate values:

To find 10% of any number, divide the number by 10 (move the decimal point one place left). To find 5% of a number, find 10% and take half of that value. To find 50% of a number, multiply the number by 2. To find 20% of a number, find 10% and double it. To find 1% of a number, divide the number by 100 (move the decimal point two places left).

46.AT.4Find and Compare with Percentages

Explain the error

Store A offers a $120 skateboard at 30% off. Store B offers the same $120 skateboard with a $40 instant manufacturer coupon.

Which store offers the lower final price? Justify your decision by showing the savings and final price at both stores.

✍️ Written response — 2 points.

56.AT.4Determine the Whole Given the Part and Percent

Part A

Marcus completed 18 math problems, which represents exactly 60% of his homework assignment. How many total problems are on the assignment?

24 problems 28 problems 30 problems 36 problems

Part B

Which equation and reasoning justifies the solution in Part A?

Multiply 18 by 0.60: 18 × 0.60 = 10.8. Add 18 and 60: 18 + 60 = 78. Since 60% of the whole equals 18, divide the part by the rate: 18 ÷ 0.60 = 30. Divide 60 by 18: 60 ÷ 18 = 3.33.