The table below shows the number of people who responded to a survey about their favourite style of music. Use this information to answer to the nearest whole percentage. What percentage of respondents aged \(21\)-\(30\) indicated a favourite style other than Rock music?
Show Hint
Subtract the Rock count from the total for the 21-30 age group, then divide by that same total.
Step 1: Find the total in the 21-30 group. From the table, the total number of respondents aged \(21\)-\(30\) is \(33\).
Step 2: Find how many chose Rock. In the same age group, \(12\) people picked Rock as their favourite style.
Step 3: Subtract to get "other than Rock". Respondents who prefer something other than Rock \(= 33 - 12 = 21\).
Step 4: Compute the percentage. Percentage \(= \frac{21}{33} \times 100 = 63.6\ldots\%\), which rounds to \(64\%\).
Step 5: Rule out the other options. \(60\%\) and \(36\%\) come from using the wrong numerator or denominator, and \(75\%\) does not match \(21\) out of \(33\) at all.
Final Answer: The percentage is \(64\%\). \[ \boxed{64\%} \]
