Question 144
14. I accidentally decreased a number by $60\%$ instead of increasing it by $60\%$. This incorrect value now needs to be increased by $k\%$ to get to the correct value. What is the value of $k$?
15. Exactly two years ago the Benson family had 4 members, and their average age was $19$. The Bensons then adopted another child. If the average age of the family today is still $19$, what is the present age of the adopted child?
15. Exactly two years ago the Benson family had 4 members, and their average age was $19$. The Bensons then adopted another child. If the average age of the family today is still $19$, what is the present age of the adopted child?