© 2025 Shmoop University, Inc. All rights reserved.
 

Math Shack

< Pick a Different Problem
I'm Feeling Lucky
View Your Progress
0

Percent Decrease

Pre-algebra

Answer questions correctly to move the progress bar forward. Once the progress bar is complete, you've mastered the topic.
Your browser does not support HTML5 Canvas. To get the most out of Math Shack you will need to upgrade to a more modern browser.
You decide to invest $12 of the $84 you have under you mattress in portable eyelash curlers. Unfortunately, the market for portable eyelash curlers unexpectedly tanks and your investment is worthless. What percent decrease of your under-the-mattress account did your ill-fated venture cause?
%
Submit

Round your answer to the nearest tenth

Where do I start?

Calculator

You Will Earn

10

Shmoints When You Master This Topic!

You've already mastered this topic. You can't earn more Shmoints for the same topic, but feel free to keep practicing.

Got Math Shack feedback? Share it with us!

Hey Teachers!

Robeefalo says...

Make homework fun.

Send a link to Math Shack. Your students will thank you.

Give Extra Credit.

For earning 100 Shmoints. The sky’s the limit.

Get Support.

If your school is using Common Core, we are all set up to support you. Click here to learn more.