Question 1: To convert a fraction to a percentage using the calculator, divide the numerator by the denominator, then multiply by 100. The formula is: (Numerator ÷ Denominator) × 100%.

Answer: divide numerator by denominator, then multiply by 100

Question 1: Use your calculator to convert the fraction 3/8 to a percentage.

Answer: 37.5

Question 2: Calculate the percentage equivalent of 5/12 using the calculator.

Answer: 41.67

Question 3: Convert 7/20 into a percentage with your calculator.

Answer: 35

Question 1: A student says that converting 2/5 to a percentage is 40% using their calculator. Is this correct? Show your working and explain your answer.

Answer: No, 2/5 = 40%, but check calculator: (2 ÷ 5)×100 = 40, so correct.

Question 2: A recipe requires 1/4 of a cup of sugar. Convert this to a percentage to understand how much sugar is needed. Use your calculator and explain each step.

Answer: 1 ÷ 4 = 0.25; 0.25 × 100 = 25%; so 25% of a cup.

Question 3: If a student mistakenly multiplies the fraction by 100 instead of dividing first, what error do they make? Illustrate with an example using 3/4.

Answer: Incorrect: 3/4 × 100 = 75, but proper method: (3 ÷ 4)×100 = 75%. The mistake is doing the multiplication directly without division.

Question 1: A survey shows that 7/10 people prefer a certain brand. Convert this fraction into a percentage to report the result.

Answer: 70%

Question 2: A class has 24 students, and 18 of them passed a test. What percentage of students passed? Show your calculator steps.

Answer: 18 ÷ 24 = 0.75; 0.75 × 100 = 75%

Question 1: A fraction was converted to a percentage as 125%. Identify the mistake if the original fraction was 3/4, and correct it.

Answer: Mistake: multiplied instead of dividing; correct: (3 ÷ 4)×100=75%

Question 2: Construct a calculator procedure to convert 9/16 into a percentage, then verify the result by calculation.

Answer: 9 ÷ 16 = 0.5625; 0.5625 × 100 = 56.25%

Question 1: A student converts 2/3 to 66.67% in their calculator. Is this correct? If not, identify the error and provide the correct percentage.

Answer: Incorrect; correct: (2 ÷ 3)×100 ≈ 66.67%, so actually correct, but check calculator accuracy.

Question 2: Explain why multiplying a fraction directly by 100 without dividing first leads to an error. Use 5/8 as an example.

Answer: Incorrect: 5/8 × 100 = 62.5%, but proper method: (5 ÷ 8)×100 ≈ 62.5%. The mistake is skipping the division step.

Question 3: Convert 4/5 into a percentage using your calculator, then check for common mistakes.

Answer: 4 ÷ 5 = 0.8; 0.8 × 100 = 80%