These five problems cover percentages, area, perimeter, volume, and distance. Try each calculation before reading the solution, and keep the units beside your numbers.
ATI’s formula guidance covers these topics and others. The questions here are original practice examples, not ATI exam items or a complete math review.
Work through these five problems
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What is 15% of 80?
Write 15% as 0.15, then multiply by 80. The answer is 12.
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A rectangle is 7 cm long and 4 cm wide. What is its area?
Multiply length by width. A = 7 × 4 = 28 cm². Area uses square units.
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A square has sides of 6 m. What is its perimeter?
Add the four equal sides. P = 4 × 6 = 24 m. Perimeter measures the distance around the edge.
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What is the volume of a rectangular prism measuring 3 cm by 4 cm by 5 cm?
Multiply all three dimensions. V = 3 × 4 × 5 = 60 cm³. Volume uses cubic units.
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How far do you travel at a constant 40 km/h for 1.5 hours?
Multiply rate by time. d = 40 × 1.5 = 60 km. The rate and time both use hours, so no time conversion is needed.
Now solve three on your own
Use the same methods on these three problems, keeping each answer hidden until you have finished your calculation.
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What is 20% of 65?
Show percentage answer
20% is 0.20, so 0.20 × 65 = 13.
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A rectangle measures 8 cm by 3 cm. What is its area?
Show area answer
Multiply length by width: 8 × 3 = 24 cm². The answer uses square centimeters because it measures area.
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How far do you travel at a constant 50 km/h for 2 hours?
Show distance answer
Distance is rate multiplied by time: 50 × 2 = 100 km. Hours cancel when km/h is multiplied by hours.
Correction to an earlier version
Use ATI’s current materials for exam rules. The previous version’s unsupported formula-sheet claim and imprecisely labeled conversions have been removed.