How can I convert 7.8 x 10^-3 to 39/5000 using a calculator?

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To convert 7.8 x 10^-3 to a fraction, start by recognizing that 10^(-3) equals 1/1000, making 7.8 x 10^-3 equal to 7.8/1000. By multiplying both the numerator and denominator by 10, you obtain 78/10000. Simplifying this fraction by removing common factors leads to the equivalent fraction of 39/5000. The process demonstrates how to use a calculator for such conversions effectively.
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how would i convert 7.8 x 10^-3 = 39/5000 / 7.8 x 10^-3 into a fraction on my calculator?

I know the result is 0.0078 but I don't know how to get it, thanks!
 
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You want to start with 7.8 x 10^-3 and end up with 39/5000 ?

10^(-3) = 1/1000, so 7.8 x 10^-3 = 7.8/1000. Multiply the numerator and the denominator by 10 to get integers and you end up with 78/10000. Remove common factors from this and you get the answer.
 
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