Oscar wants to train for a marathon. He plans to add 2/3 of a mile each week until he reaches a 20-mile run. How many weeks before the marathon should he start training if he has already run 2 miles? Let's think step by step and output the final answer after "####".
user
Oscar needs to increase his maximum running time from 20 - 2 = <<20-2=18>>18 miles.
Oscar will need a total of 18 / ( 2 / 3 ) = <<18/(2/3)=27>>27 weeks to prepare.
#### 27
Oscar wants to train for a marathon. He plans to add 2/3 of a mile each week until he reaches a 20-mile run. How many weeks before the marathon should he start training if he has already run 2 miles?
train