Mrs. Greer was making pancakes for breakfast. Baking is an exact science so correct measurements are crucial. She had a recipe that called for 1 1/2 cups of water for 2 cups of mix. She only had 1 1/2 cups of mix. How much water should she add as a fraction, since her measuring cup only has fractions. (This is a true story, I actually did this on Sunday, only an exact fractional answer will count)