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Get\ the\ total\ number\ of\ pens\ by\ adding\ them\ both. \\ \\ 24\ red\ pens+6\ black\ pens\to\boxed{30\ pens} \\ \\ Thus,there\ are\ 30\ pens\ overall. \\ \\ "black\ pens\ to\ the\ total\ number\ of\ pens" \\ \\ Therefore,\boxed{\boxed{6:30}}\ is\ the\ ratio\ and\ proportional\ answer. \\ \\ Hope\ it\ Helps:) \\ Domini
24 is red ballpens + 18 because it said that 6 fewer black pens so answer 42 

18:42 is the answer if it needs to be in lowest term it will be:


i hope it helped :)