SOLUTION: if x onions cost r cents, how many onions can be bought with d dollars? the choices are: a) 100d/xr b) r/100dx c) 100

Question 200846: if x onions cost r cents, how many onions can be bought with d dollars?
the choices are: a) 100d/xr
b) r/100dx
c) 100r/dx
d) 100dx/r
e) dx/100r
Thank you for helping me!
Found 2 solutions by Alan3354, Earlsdon:
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
if x onions cost r cents, how many onions can be bought with d dollars?
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d dollars = 100d cents
an onion costs r/x cents --> x/r onions/cent
100d * (x/r) = # of onions
= 100dx/r
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multiplying and dividing the units, not just the numbers or variables, makes it clear.
Answer by Earlsdon(6294) (Show Source): You can put this solution on YOUR website!
You can use proportions to solve this problem:
Let y = the number of onions in question, then you can write the proportion:
You must write 100d to convert the dollars (d) into cents. Multiply both sides by 100d to get:

So answer d) is the best choice.
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