what two decimals that are equivalent to 0.68

Answer 1

decimal representations of numbers are unique if you use a finite number of decimals.
If you allow repeating decimals, then
0.68 = 1.679999999... with the 9 repeated.

Two or more fractions can represent the same number, but only one decimal number can

e.g.

1/4 = 2/8 = 3/12 = ... = 0.25