Answer:
Leah's unit rate is 16 problems per minute.
Step-by-step explanation:
To find her unit rate, we need to find how many problems she can do in 1 minute. Our current fraction is [tex]\frac{40}{2.5}[/tex]. We need to divide the top and bottom by 2.5 to get the rate per minute
[tex]\frac{40}{2.5}[/tex] = [tex]\frac{16}{1}[/tex]
Leah's unit rate is 16 problems per minute.