Use a base of 100 to find the overall percentage change.<br><br>&bull; Let original price = 100<br>&bull; After 20% increase: \(100 \times 1.20 = 120\)<br>&bull; After 15% decrease: \(120 \times 0.85 = 102\)<br>&bull; Overall change = 102 − 100 = +2<br><br>Final Answer: 2% increase