Change .8 to sixteeths inches?

.8 equals 8/10 which is slightly larger then 3/4. (3/4 - 7.5/10)

3/4 equals 12/16, so .8 is slightly larger than 12/16, so call it 13/16 which is close enough if you are doing carpentry.

If you need more accuracy, set it up like this:

8 / 10 = ? / 16 (where ? is unknown)

Use cross-multiplication to solve for the unknown:

8 x 16 = 10 x ?

128 = 10 x ?

128 / 10 = ?

12.8 = ?

So 8 / 10 = 12.8 / 16

which is pretty close to what we guessed, 13/16.

- wjs1632 -