Final answer:
To find the 90-day forward price, add the forward premium to the spot exchange rate.
Step-by-step explanation:
To find the 90-day forward price, you need to calculate the premium and add it to the current spot exchange rate. The forward premium is given as 10 percent. Since it's a premium, we add it to the spot exchange rate:
Forward Premium = Spot exchange rate * (Premium/100) = 1.50 * (10/100) = 0.15
Forward Price = Spot exchange rate + Forward Premium = 1.50 + 0.15 = 1.65