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?
Start with taking out the older pennies 200 pennies - 30 pennies = <T>subtract(200, 30)=170 pennies
Take the 170 pennies * .20 = <T>multiply(170, 0.2)=34.0
170 pennies - 34 pennies = <T>subtract(170, 34)=136 pennies.
