Answer :

since 10 is smaller than 100, Garricks plant is SHORTER than Zan's plant

This means that each mm for Garrick will result in a GREATER percent error

10-8=2. His measurement was 2 mm off

100-88=12 so Zans answer was 12 mm off

2/10*100=20%

12/100*100=12%

Answers:

1. Shorter
2. Greater
3. 2 mm 
4. 12 mm 
5. 20%
6. 12%

Hope this helped!! :D