There is 4.88% decrease in Olivia's score.
Step-by-step explanation:
Given,
Score on first math test = Old value = 82 points
Score on second math test = New value = 78 points
Change = New value - Old value
Change = 78 - 82 = -4
The negative sign indicates the decrease.
Decrease percent = 
Decrease percent = 
Decrease percent = 4.88%
There is 4.88% decrease in Olivia's score.
Keywords: percentage, difference
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Answer:
6.75
Step-by-step explanation:
2 crackers=5.50
1 cracker=5.50÷2
=2.25
3 crackers=2.25×3
=6.75