Answer: There is an increase of 50% in sales.Step-by-step explanation:Since the Jollibee Branch recorded 100.00php in their previous week and then 150.00php in the following week we can infer that:Step 1: Figure out how much the sales increased150.00 (Current Week) - 100.00 (Previous Week) = 50.00 (The Increase)Step 2: What part of the original sales is the 50php?100.00 (Previous Week Sales) - 50.00 (The Increase in Sales) = 50.00 (Half)Step 3: Find the Percentage The half of 100php is 50php (50%)