Question

On a hike, William passed a sign that said his elevation was 20 1/2 feet

above sea level. He hiked downhill for a while longer until his elevation had
decreased by 28 feet. What is his new elevation?

Answer 1

-7.5 OR -7 1/2

Explanation:

20.5 - 28 = -7.5

OR

20 1/2 - 28 = -7 1/2