[CurlyDave]

...I see this as an arcane question. I don't fault anyone for failing to notice that 3/5 is 12/20, and hence the largest. Math rules...

This is not a particularly difficult question. I put it more in a "general education" category than a hard math question. Every teacher above kindergarten should be able to answer it without blinking an eye.

If you think this is "arcane" what happens when the kids get to algebra? Or, a little bit of trigonometry anyone?

[Jim Noble]

If you think this is "arcane" what happens when the kids get to algebra? Or, a little bit of trigonometry anyone?

The boys get violent, and the girls get pregnant.

Everybody knows that.

[Aevery_Freeman]

Thank you! A balked at responding to that post - no wish to offend - but you are absolutely correct.

Try geometry, trig, complex numbers, calculus without understanding simple ratios, and...uh...good luck!