What's the difference between 126 1⁄4 and 78 2⁄3? a. 47 7⁄12 b. 48 1⁄3 c. 57 7⁄12 d. 58 5⁄12

Okay so you need to convert 126 1/4 to an improper fraction...

126*4+1/4- 78 2/3

Simplify 126*4

504+1/4- 78 2/3

505/4- 78 2/3

Now you need to convert 78 2/3 to an improper fraction as well.

505/4- 78*3+2/3

Simplify 78*3

505/4-234+2/3

505/4-236/3

Find the LCD (least common denominator) of the improper fractions.

4, 8, 12,

3, 6, 9, 12

LCD=12

505*3/4*3- 236*4/3*4

1515-944/12

571/12

=47 7/12

So A

ca = ec

cpctc makes it so that corresponding parts of the triangle you proved to be equal are equal, the other options aren't part of the part of the triangles you proved to be equal.