Answer :

There is 75% decrease.

Step-by-step explanation:

Given,

Old value = 688 qt

New value = 172 qt

Change = New value - Old value

Change = 172 - 688

Change = -516 qt

The negative sign indicates decrease.

Decrease percent = [tex]\frac{Change}{Old\ value}*100[/tex]

Decrease percent = [tex]\frac{516}{688}*100[/tex]

Decrease percent = [tex]\frac{51600}{688}[/tex]

Decrease percent = 75%

There is 75% decrease.

Keywords: division, subtraction

Learn more about subtraction at:

  • brainly.com/question/10196212
  • brainly.com/question/1021953

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Rewritten by : Barada

Answer:

75% decrease.

Step-by-step explanation: