Marco owns an ice cream truck.  His ice cream cones are $5 each.  If his expenses are 80% of total sales for the day, how many ice cream cones would he need to sell to make a $200 profit for the day?
His expenses are 80/100 = 4/5.
His profit would be 20/100 = 1/5.
Total sales for the day is $200 x 5 = $<<200*5=1000>>1000.
Total ice cream cones he sells is $1000 / 5 = <<1000/5=200>>200.
#### 200