The amount increased 4% from last year.
Step-by-step explanation:
Given,
Average cost last year = $625
Average cost this year = $650
Increase amount = Average cost last year - Average cost this year
Increase amount = 650 - 625 = $25
Percent increase = [tex]\frac{Increase\ amount}{Average\ cost\ last\ year}*100[/tex]
[tex]Percent\ increase=\frac{25}{625}*100\\Percent\ increase=\frac{2500}{625}\\Percent\ increase=4\%[/tex]
The amount increased 4% from last year.
Keywords: percentages, subtraction
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