Answer: 84/100, but if you want it in its fully simplified form, 21/25.
Step-by-step explanation: Any decimal can be turned into a fraction by removing the '0.' and putting it over 100. For example, 0.23 can become 23/100.
You then have to simplify your answer. 84 divided by 4 is 21. You also have to divide 100 by 4, because if you times the numerator by a value, you have to times the denominator by the same value too, to keep it the same. Therefore, we have 21/25.