(adsbygoogle = window.adsbygoogle || []).push({}); Consecutive numbers without using a "7"?

I tried to calculate the number of consecutive integers between 10,000 and 99,999 that do not use the number 7. I got part of the way there.

There are 90,000 numbers(if you start with 10,000) and if you subtract 1/9 of 90,000 that will give you a total of 80,000 that don't begin with a seven. How do you handle the calculation of the the seven in the thousands, hundreds, tens and units place?

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# Consecutive numbers without using a 7 ?

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