1- Before going on a diet, Joe weighed 220 lbs. He now weighs 195 lbs. His weight has changed by _______%.

6. A fraction changes from 3/4 to 4/10. The numerator changed by _____%; the denominator changed by _____%; the value of the fraction changed by approximately _____%.

7. Assume a Normal distribution with an average return of 7% and a standard deviation of 2%. What is the probability of an actual return of (a) more than 11%; and (b) less than 5%?