Craig is training to try out for the wrestling team at his school. Each week he records the number of sit-ups he can do in 1 minute so that he can track his improvement. The table shows his results over the first 3 weeks.

Week Number of Sit-Ups
1 40
2 44
3 47
Find the percent of change from Week 1 to Week 2 and from Week 2 to Week 3. Round to the nearest tenth percent if necessary.

Percent of change from Week 1 to Week 2:
%

Part B
Fill in the blank question.
Percent of change from Week 2 to Week 3:
%