Afire truck has a long ladder that is made of 3 sections. each section is 43/4 meters long. how long is the ladder when all 3 sections are extended to make one long ladder

You need to simplify the improper fraction into a mixed number. 

43/4 = 10 3/4 (or 10.75)
You will want to have your answer as a mixed number, but multiplying might be easier if you use the decimal for calculations.

Now you multiply your mixed number or decimal by 3 (3 sections).

10.75 * 3 = 32.25 or 32 1/4

Your answer would be 32 1/4 meters. 

Hope this helps :)