The price of an item yesterday was $180 . Today, the price rose to $207 . Find the percentage increase.
To find the percentage increase, we need to calculate the difference between the final price and the initial price, and then divide that difference by the initial price.
The difference between the final price and the initial price is $207 - $180 = $<<207-180=27>>27.
Now, we divide the difference by the initial price: $27 / $180 = 0.15.
To express this as a percentage, we multiply by 100: 0.15 * 100 = 15.
Therefore, the percentage increase is 15%.