Greetings to All!
This is my very first post on a Math forum. I am studying for GRE and there's one particular problem type on ratios which confuses me totally.. Multiple ratios combining..
Say I have two ratios with me
A : B => 21:23
C : D => 9:7
How do I determine A : B : C : D?
Thx a lot for your replies and your time..