To find the relative frequency in percentages for each grade class, we need to follow these steps:

1. Calculate the total frequency.
2. Divide the frequency of each class by the total frequency.
3. Convert the resulting ratio to a percentage by multiplying by 100.
4. Round to two decimal places.

Step 1: Calculate the Total Frequency

$\text{Total Frequency} = 22 + 1414 + 1515 + 77 + 22 = 3030$

Step 2: Calculate Relative Frequencies

For each grade:

• A: $\text{Relative Frequency (A)} = \left(\frac{22}{3030}\right) \times 100 = 0.726 \approx 0.73\%$
• B: $\text{Relative Frequency (B)} = \left(\frac{1414}{3030}\right) \times 100 = 46.67\%$
• C: $\text{Relative Frequency (C)} = \left(\frac{1515}{3030}\right) \times 100 = 49.92\%$
• D: $\text{Relative Frequency (D)} = \left(\frac{77}{3030}\right) \times 100 = 2.54\%$
• F: $\text{Relative Frequency (F)} = \left(\frac{22}{3030}\right) \times 100 = 0.726 \approx 0.73\%$

Completed Table

Grade	Frequency	Relative Frequency (%)
A	22	0.73
B	1414	46.67
C	1515	49.92
D	77	2.54
F	22	0.73

Would you like more details or have any questions?

Here are five questions you might ask:

1. How do you calculate the total frequency in a frequency table?
2. What is the formula for calculating relative frequency?
3. Why do we convert the relative frequency to a percentage?
4. How do you round numbers to two decimal places?
5. Can you explain how relative frequencies help in data analysis?

Tip: Always double-check your total frequency before calculating relative frequencies to avoid errors in your results.