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Word Problems on Addition and Subtraction of Fraction

Question...
Mr. Castillo works in a furniture shop. He cut 12---1/2 dm of wood from a 15-1/4 dm of wood for his table frame.
How long was the piece of wood left?


Sagot :

2.25 or 2.3
because the problem is minus the 12 and 1/2=6 and the other one 15-1/4=3.75
there fore 2.25-3.75=2.25 or 2.3
12 1/2 =  12 2/4
15 1/4 =  15 1/4

15 1/4 - 12 2/4 = 2 3/4 was the piece of wood left.