210 is p% greater than 30. What is the value of p ?

Explanation

To find the value of p, we start with the equation 210 = (1 + p/100) * 30. This equation translates to 210 representing a p% increase over 30. Dividing both sides by 30 gives us 7 = 1 + p/100. Subtract 1 from both sides to get 6 = p/100. Finally, multiplying both sides by 100 results in p = 600. Therefore, the value of p is 600. The other options, 650, 700, and 800, are incorrect due to potential calculation errors or misconceptions about percentage increases.