Answer:
completed packing: 67.9245%
not done yet: 32.0755%
Step-by-step explanation:
given:
- 36 has been packed.
- total inviting 56 guests
- not done: 53 - 36 = 17 packages
solve:

67.9245%
67.9%
67.9% of the packaging has been done.
Not been ready: [ total shall be 100% ]
100% - 67.9245%
32.0755%
32.1%
32.1% needs to be packed in order to complete packaging.