Question 1127570
<br>
In your post, you omitted the number of kg of cloth you want, so we can't give you the answer.<br>
But we can tell you how to find the answer easily.<br>
The 96% is 4% away from the 100% pure silk; it is 11% away from the 85% silk.  That means the two kinds of silk must be mixed in the ratio 4:11; since 96% is closer to 100% than to 85%, the larger portion needs to be the pure silk.<br>
ANSWER: mix the two kinds of silk in the ratio 11 parts pure silk to 4 parts 85% silk.