Multiply and Divide Rational Expressions · Exercise 54

Area of a triangle The area of a triangle with base b and height h is $\frac{bh}{2}.$ If the triangle is stretched to make a new triangle with base and height three times as much as in the original triangle, the area is $\frac{9bh}{2}.$ Calculate how the area of the new triangle compares to the area of the original triangle by dividing $\frac{9bh}{2}$ by $\frac{bh}{2}$.

Its source prints no answer for this problem, so there's nothing to check against.

OpenStax, Elementary Algebra 2e · §8.2 Multiply and Divide Rational Expressions · Exercise 54