{2, 5, 3, 1, 0, 3, 7, 2, 2} is the data set. We can find this by finding <span>relative frequency of 3 = 2/9 = 0.22 and then 150 times .22 = 33 units</span>
When you're out shopping and something you want to buy is on sale. You can take the original price and give it's percentage to find out how much it really is.