coach berry was calculating how many floors to buy for the new court. He measured the floor area of the court 4,750 ft sq. However, he knows the court should be 4,700 ft sq. What is his percent error?

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