Answer:
Riley rakes 1/4 of the lawns per hour.
Explanation:
It is given that,
Riley rakes 1/6 of a lawn in 2/3 hour.
We need to find how many lawns can Riley rake per hour.
In 2/3 hour Riley rakes 1/6 of a lawn
In 1 hour Riley rakes
= 1/4 of a lawn.
Hence, Riley rakes 1/4 of the lawns per hour.