To convert 78 cm to inches, we need to use the conversion factor that relates centimeters to inches: 1 inch = 2.54 cm. This means that for every 1 inch, there are 2.54 cm.
To begin, we will set up our conversion as a fraction:
78 cm x (1 inch/2.54 cm)
Next, we will simplify the fraction by dividing the numerator and denominator by the common factor of 2.54:
78 cm x (1/2.54) inch
Now, we can solve for the final value by multiplying 78 cm by 1 and dividing by 2.54:
78 x 1 = 78
78/2.54 = 30.708661 inches
Therefore, 78 cm is equal to approximately 30.71 inches.
To double check our conversion, we can use the fact that 1 inch is equal to 2.54 cm to convert our answer back to cm:
30.71 inches x (2.54 cm/1 inch) = 30.71 cm
Since our answer is equal to the original value of 78 cm, we can be confident that our conversion was correct.
In summary, to convert 78 cm to inches, we set up our conversion as a fraction and simplify it by dividing the numerator and denominator by the conversion factor. We then solve for the final value by multiplying and dividing. If desired, we can also double check our answer by converting it back to the original unit.