WGU D771 QUANTITATIVE LITERACY FULL
SOLUTION STUDY GUIDE
◉ How do you convert a decimal to a percent?
Answer: Multiply by 100. (0.25 → 25%).
◉ How do you convert a percent to a decimal?
Answer: Divide by 100. (75% → 0.75).
◉ How do you find 10% of a number quickly?
Answer: Move the decimal one place to the left.
◉ Example: What is 25% of 200?
Answer: 200 × 0.25 = 50.
◉ What is a ratio?
Answer: A comparison of two numbers (e.g., 2:3).
◉ What is a rate?
Answer: A ratio with different units (e.g., miles/hour).
, ◉ What is a unit rate?
Answer: A rate with denominator of 1 (e.g., $2 per slice).
◉ What is a proportion?
Answer: An equation showing two ratios are equal.
◉ How do you solve a proportion?
Answer: Cross multiply and divide.
◉ Example: 3/4 = x/12. Solve for x.
Answer: x = 9.
◉ How do you find the perimeter of a rectangle?
Answer: 2 × length + 2 × width.
◉ Example: Rectangle 10 ft by 14 ft perimeter?
Answer: 48 ft.
◉ What is the circumference of a circle?
Answer: Distance around a circle.
◉ Formula for circumference using diameter?
SOLUTION STUDY GUIDE
◉ How do you convert a decimal to a percent?
Answer: Multiply by 100. (0.25 → 25%).
◉ How do you convert a percent to a decimal?
Answer: Divide by 100. (75% → 0.75).
◉ How do you find 10% of a number quickly?
Answer: Move the decimal one place to the left.
◉ Example: What is 25% of 200?
Answer: 200 × 0.25 = 50.
◉ What is a ratio?
Answer: A comparison of two numbers (e.g., 2:3).
◉ What is a rate?
Answer: A ratio with different units (e.g., miles/hour).
, ◉ What is a unit rate?
Answer: A rate with denominator of 1 (e.g., $2 per slice).
◉ What is a proportion?
Answer: An equation showing two ratios are equal.
◉ How do you solve a proportion?
Answer: Cross multiply and divide.
◉ Example: 3/4 = x/12. Solve for x.
Answer: x = 9.
◉ How do you find the perimeter of a rectangle?
Answer: 2 × length + 2 × width.
◉ Example: Rectangle 10 ft by 14 ft perimeter?
Answer: 48 ft.
◉ What is the circumference of a circle?
Answer: Distance around a circle.
◉ Formula for circumference using diameter?
