Suppose your company imports computer motherboards from Singapore. You have just placed an order for 40,000 motherboards at a cost to you of 143.80 Singapore dollars each. You will pay for the shipment when it arrives in 30 days. You can sell the motherboards for $138 each. The current exchange rate is S$1.1475/$.

What is the percentage change in the exchange rate that would result in a break-even profit? (A negative answer should be indicated by a minus sign. Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.)