Write this ratio as a fraction in lowest terms.

The ratio of 5 to 6

To write this ratio as a fraction in lowest terms, we simply write the ratio as a fraction and simplify if possible.

The ratio of 5 to 6 can be written as 5/6.

Since 5 and 6 do not have any common factors other than 1, the fraction 5/6 is already in its simplest form.

Therefore, the ratio of 5 to 6 in lowest terms is 5/6.