SOLUTION: The number of opera companies in the united states decreased from 97 in 1985 to to 89 in 1998 what percent is the decrease?

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Question 379360: The number of opera companies in the united states decreased from 97 in 1985 to to 89 in 1998 what percent is the decrease?
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
89+=+97%281-r%29%5E8. We have to solve for r.
89%2F97+=+%281-r%29%5E8,
root%288%2C89%2F97%29+=+1-r, or
1-root%288%2C89%2F97%29+=+r. Then r = 0.0107, or 1.07%.