First, let’s find out how long it takes Pete to mow one lawn.
If Pete can mow 1/5 of a lawn in 15 minutes, then to mow one whole lawn, he would take:
Now, let’s convert 75 minutes into hours:
So, it takes Pete 1.25 hours to mow one lawn.
To mow 7 lawns, Pete would take:
Therefore, it would take Pete 8.75 hours to mow 7 lawns.