Archie is playing with his marbles outside. He loses 60% of them into the street. Of the remaining ones, he loses half down a sewer. If he has 20 left, how many did he start with?
He had 40 before losing them into the sewer because 20 x 2 =<<40=40>>40
He started with 100 because 40/.4=<<100=100>>100
#### 100