The following equation expresses p% of q is k.

Then we can write q% of p as:

So the answer is 1/k
You can buy 7 packs, because if you multiply 11x7 you would get 77. hope that helps
We have: 5m 75cm = 5.75 m
So the length of each piece is : 
ok done. Thank to me :>
1000/7 = <span>142.857142857
Because this is not an even number we take "142", then times it by 7 teachers.
142*7= 994
1000 - 994 = 6 Pencils left</span>