Math conversion
posted by jakey on .
If one meter is equal to 39.4 inches, how many centimeters are in one foot?
Answer 30.4 cm
How is this answer obtained?
i know there is 12 in in a foot
and 100 centimeters in a meter.
what happens next?

1ft*12in/ft*100cm/39.4in= xxx cm

I still don't get it.

I know!

(1 m/39.4 in)(12 in / 1 ft)(100 cm/m)
= 30.46 cm / ft 
because
(m/in)(in/ft)(cm/m) = cm/ft