Answer
6%
Work Step by Step
$\Delta\ qty=\Delta\ price\times E_d$
$\Delta\ qty=10\times0.6$
$\Delta\ qty=6$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.