Answer:
hour or 50 minutes
Explanation:
Last week:
Claire mowed 5 lawns
She mowed each lawn in
hour.
She spent

hours to mow 5 lawns.
This week:
Claire mowed 5 lawns
She mowed each lawn in
hour.
She spent

hours to mow 5 lawns.
Difference:

hour or 50 minutes.