conversations.from: human
conversations.value: Can you explain how to solve this math problem: Iain has 200 pennies. He realizes that 30 of his pennies are older than he is. If he wishes to get rid of these pennies and then throw out 20% of his remaining pennies, how many will he have left?
conversations.from: assistant
conversations.value: Start with taking out the older pennies 200 pennies - 30 pennies = 170 pennies
  Take the 170 pennies * .20 = 34
  170 pennies - 34 pennies = 136 pennies.