ExplanationTo find the new rate in words per hour, start by setting up an equation to find this value:

New words per hour = 10 + 2(Old words per hour)

The old rate was given in words per minute, so convert to words per hour:

10 words per min × 60 min per hour = 600 words per hour

Now plug into the equation:

New words per hour = 10 + 2(600) = 1,210

Note that it would be dangerous to start by working with the rate per minute. If you did so, you might calculate 10 + 2(10) = 30 words per minute, then 30 × 60 = 1,800 words per hour. This rate is inflated because you added an additional 10 words per minute instead of per hour. Perform the conversions right away!

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Sandy

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