Answer: (50%)Step-by-step explanation: To find the percentage increase in sales at the Jollibee branch, we can follow these steps:1. Determine the increase in sales: Subtract the initial sales from the new sales.{Increase in sales} = {New Sales} - {Initial Sales} = ₱150,000 - ₱100,000 = ₱50,000 2. Calculate the percentage increase: Divide the increase in sales by the initial sales and then multiply by 100 to get the percentage. {Percentage Increase} = left \frac{\{Increase in Sales}{Initial Sales} right x 100 {Percentage Increase} = \frac{₱50,000}{₱100,000} Right x100 = 50\% So, the percentage increase in the Jollibee branch's sales is 50%. This means that the branch experienced a significant boost in sales, which is great news!