SOLUTION: Hi, Water temperature changed from 80°F to 90°F over a 10 minute period. What was the percent of increase?

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Question 879718: Hi,
Water temperature changed from 80°F to 90°F over a 10 minute
period. What was the percent of increase?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
100%28%2890-80%29%2F80%29 is the % Increase