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sveticcg [70]
3 years ago
14

The monthly rent of Marilyn's house went from $500 to $400, if p is the percent decrease in the rent, which proportion can be us

ed to calculate p?
Mathematics
1 answer:
faust18 [17]3 years ago
3 0
For this case we can use the following rule of three:
 $ 500 ---------> 100%
 $ 400 ---------> x
 Clearing x we have:
 x = (400/500) * (100) = 80%
 Therefore, the percentage of decrease in the rent is:
 p = 100-x
 p = 100-80
 p = 80%
 Answer:
 
a proportion can be used to calculate p is:
 
p = 100 - ((400/500) * (100))
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