For this case we can make the following rule of three: 1/10 scarf ------> 4/5 hour x ------------------> 1 hour Clearing the value of x we have: x = (1 / (4/5)) * (1/10) Rewriting we have: x = (5/4) * (1/10) x = 5/40 x = 1/8 Answer: A fraction of a scarf that alison can knit in 1 hour is: x = 1/8
