A researcher found that 55% of families in the United States have one child under the age of 21, 22% have two children under the age of 21 15% have three children under the age of 21, 5% have 4 children under the age of 21 and 3% have 5 or more children under the age of 21. If a family is selected at random, what is the probability the family has 1 or 2 children under the age of 21? (Express your answer as a percent, Please Include the % symbol .)