let's name all the purchases "x"
so \(\frac{4}{25}\)of them were stuffed animals, and out of that \(\frac{10}{21}\) were bears.
to get the results we have to multiply the fraction of bears by the fraction of the stuff animals:
\(\frac{4}{25}*\frac{10}{21}\).
and now we simplify:
\(\frac{4*2}{5*21}\)=\(\frac{8}{105}\)
and this is the answer!