Cakes

On the bowl were a few cakes. Jane ate one-third of them, and Dana ate a quarter of those cakes that remained.

a) What part (of the original number of cakes) Dana ate?
b) At least how many cakes could be (initially) on the bowl?

Result

a = 1/6
b =  6

Step-by-step explanation:

$a=\left(1-1\mathrm{/}3\right)\mathrm{/}4=1\mathrm{/}6$
$b=1\mathrm{/}\left(1\mathrm{/}6\right)=6$

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