<h3><u>
Answer:</u></h3>
<h3><u>
Step-by-step explanation:</u></h3>
<em>There can be many ways to find the number.</em><em> I have found the number with the help of fractions and multiplication. </em><em>Below is the solution to your problem.</em>
- 80 = 20/100
- => 5 x 80 = 20 x 5/100
- => 400
<h3><u>
Conclusion:</u></h3>
<em>Hence, 80 is 20% of 400. </em><em>I hope my method helped you.</em>

To measure the length of a school hallway in metric units, you should probaly use meters
Answer:
Calcium carbonate is considered a compound because it is made up of two or more elements. *The elements are carbon, oxygen, and calcium.-Just incase you needed them.*
Step-by-step explanation:
PLEASE LMK IF I WAS RIGHT OR WRONG!!
Hopefully I was right and it helped.