Suppose that a photocopy machine can reduce copies to 70 percent of their original size. By copying an already reduced copy, further reductions can be made.

1. If a page is reduced to 70 percent, what percent enlargement is needed to return it to its original size?
answer = percent

2. Estimate the number of times in succession that a page must be copied to make the final copy less than 15 percent of the size of the original.
number of times =