The rate has grown 2%. The rate has fallen 2%. Here, does they mean the rate has grown/fallen “BY” 2%? Thank you!

Item 1, 2 refer to 10% of the extract. Does it mean item 1+item2=10% of the extract? Or item 1 and item 2 respectively refer to 10% of the extract?

If you do not have any of three documents, we cannot approve it. Does it mean they require all of the three documents and if I don’t have one of them they won’t approve it?

For the small fraction of what we spent at war in Iraq we could support institutions so that fragile states don’t collapse in the first place, and invest in emerging economies that become markets for our goods. It's not just the right thing to do, it's the smart thing to do. Here, what do “states” and “institutions” mean?

Meaning of not so much as. At that age, neither of us had suffered so much as an ingrown toenail. I’d like to know the meaning of the above sentence. Does it mean at that time they did not suffer anything, even not as much as an ingrown toenail?

Do you think I can omit “for them” here? “We invited people in order to provide our samples “for them.”

Could you please let me know which is a correct sentence out of 3? 1. The picnic was cancelled, caused by the weather. 2. The picnic was cancelled as it was caused by the weather. 3. The picnic was cancelled, which was caused by the weather.

If I say “She addressed international cooperation.”, do you think “address” sounds like “talk about”? or “deal with”?

In conjunction with/ take advantage of I would like to say “we’d like to hold meeting A before/after meeting B.” Can I say as follows? 1. We would like to hold meeting A in conjunction with meeting B. 2. We would like to hold meeting A taking advantage of meeting B.