Question 857801
{{{100-(100/22)N=86}}}
{{{(100/22)N=14}}}
{{{N=((14)(22))/100}}}
{{{N=(7)(11)/25}}}
{{{N=77/25}}}
This number is a little greater than 3. 
So more than 4 wrong would be below 86.
3 wrong would be above 86.
You cannot get an 86 exactly.