50% of all the cakes jenny baked that week were party cakes, 1/5 were fruit cakes, and the remainder were sponge cakes, what per

centage of cakes were sponge cakes?

Mathematics

1 answer:

AlladinOne [14]3 years ago

3 0

$x-\ all\ cakes\\\\
50\%x=0,5x\\\\
\frac{1}{5}x=0,2x-\ fruit\ cakes\\\\
sponge\ cakes=1x-0,2x-0,5x=1x-0,7x=0,3x\\\\
Sponge\ cakes\ were\ 30\%\ of\ all\ cakes.
$

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