Jake has 17 fewer peaches than Steven who has 39 more peaches than Jill. Steven has 37 peaches. How many more peaches does Jake have than Jill?
Steven has 37 peaches. 
Steven has 39 more peaches than Jill. 
That means Jill has -2 peaches. 
Jake has 17 fewer peaches than Steven. 
That means Jake has 20 peaches. 

Jake has 20 peaches and Jill has -2 peaches. Jake has 22 more peaches than Jill.