can someone help me derive an equation converting km into miles?

Question

anonymous · Answer

$ 1 $ km $ \approx \frac58$ miles

anonymous · Answer

49.2 km are equivlent to 30.57 m. what is the distance in miles of 96.2 i got 59.8 but i need to derive an equation converting distance in km to distance in miles

sasogeek · Answer

y km = (5/8) y miles

anonymous · Answer

Saso and lala, it's not equal, we are just approximating here.

anonymous · Answer

i wanna learn how to do it step by step.

lalaly · Answer

first of all 30.57m is meters 
u have to write 30.57 miles

km               mile
49.2              30.57
96.2              x

49.2x = 30.57*96.2

sasogeek · Answer

my bad, i don't know the latex for approximation... maybe i should've used the equation too but thanks for the heads up :)

sasogeek · Answer

tool*

anonymous · Answer

lalaly igot that but i didnt think i had it right.

anonymous · Answer

No problem saso.It's just something to keep in mind, on a similar note I would like to cite the example that many people still believe that pi is equal to $\frac{22}7 $.

anonymous · Answer

*pi= $ \pi $

sasogeek · Answer

the decimals of pi are actually quite a lot, i think it's an irrational number and i dunno why people equate it to that fraction lol, i'd normally work with $$\pi$$ and approximate my final answer

anonymous · Answer

Yes I too believe that it's irrational, non-terminating and non-recurring (yet!).

sasogeek · Answer

you mean the number is still growing bigger....?   "yet!" ...

anonymous · Answer

Yes of-course it's going big and big.

anonymous · Answer

Isn't it not really correct to say it's "growing," more just that due to the tools available to people now, it is known to a greater number of decimal digits, which are increasing?