The two triangular pyramids are similar. the smaller pyramid has a volume of 52 inches3. what is the volume of the larger pyramid? round to the nearest tenth. answer 175.5 in³

See the picture to better understand the problem

we know that
scale factor=12/8----> 1.5

volume larger pyramid=scale factor³*volume smaller pyramid
scale factor=1.5
volume smaller pyramid=52 in³
so
volume larger pyramid=1.5³*52-----> 175.5 in³

the answer is
175.5 in³

Yea they are simplyfiy the ratios

The expression -8/-4 has the same value as -18/-9.