Question

Abby has 75% more CD's than Barb, and Cathy has 30% more CD's than Barb. To the nearest percent, what percent more CD's does Abby have than Cathy?

Answer 1

Assume Barb has 100.
If Abby has 75% more, she has 175
If Cathy has 30% more, she has 130
Now for the main question.
If we take Cathy to mean 100% how many above that does Abby have.
\[\frac{100}{130}=\frac{x}{175}\]

Finally the question asks how what percent MORE...so subtract 100 from the value of x and you're done!