The temperature changes by -7/18 degrees Fahrenheit each day. We are calculating the change over 3 days. so we multiply -7/18 by 3/1. -7/18 * 3/1 = -21/18. Then, we simplify the answer. since 3 can go into both 21 and 18 we divide -21 by three to get -7, and 18 divided by 3 = 6. The answer is -7/6.
