SOLUTION: Can a/b and (a+b)/b ever form a proportion? Why or why not?

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Question 894784: Can a/b and (a+b)/b ever form a proportion? Why or why not?
Answer by josgarithmetic(39630) About Me  (Show Source):
You can put this solution on YOUR website!
NO.

a%2Fb=%28a%2Bb%29%2Fb
ab=%28a%2Bb%29b
ab=ab%2Bb%5E2
0=b%5E2
b=0

Both ratios would be undefined. Denominator must not be zero.