Answer:
13% did not experience problems with online transactions.
Explanation:
Giving the following information:
According to a recent Harris Interactive poll, 87% of people have experienced problems with an online transaction.
What percentage of people did not experience problems with an online transaction?
In this case, there are two options. You buy something online and everything went smooth or you have problems with the transactions.
So, if 87% have problems, that means that 13% didn't.