Pl me picture included plzzz this is the last question of my testif i do ill give u a branileset answer when i can

There are 100 centimeters in a meter. Since they are similar triangles, you have to figure out 6cm x = 100cm  to do that you divide 100/6 to get 16.666666 cm. To find DE you then need to multiply 9 cm (AB) by 16.6666666 cm.  That will equal 150 cm. You want the answer in meters and so you divide by 100, since there are 100 centimeters in a meter, to get 1.5.
Your answer is 1.5 m