Question

Roller Coaster at an amusement park is 2/3 m high. If a new roller coaster is built that is 3/5 times the height of the existing coaster, what will be the height of the new roller coaster?

Answer 1

existing coaster {h} = 2/3 m
new r c [h] = 3/5*h of existing one
                =3/5*2/3
                = 6/15 m or 0.4 m

Answer 2

Let us consider that the new roller coaster's height is $h$.

The old one is $\frac{2}{3}$ of a meter.(it is a little short, but anyway)

$\frac{2}{3} (\frac{3}{5})$= 
$h=6/15 m$
Or in decimals: $h=0.40m$

Conclusion:
1.The new roller coaster's height is $0.40m$