Hey there! :)
Since 2 4/5 is greater than 1/4, the answer is negative.
You can just subtract 2 4/5 and 1/4 and add the (-) sign
2 4/5 - 1/4
Change the fractions so they can have a common denominator: 20
2 4/5 = 2 16/20
1/4 = 5/20
2 16/20 - 5/20 = 2 11/20
Add the (-) sign → -2 11/20
Answer ⇒ -2 11/20
:)
The coefficient would be c I believe I may be wrong
264
132 * 2
66 * 2 * 2
33 * 2 * 2 * 2
11 * 3 * 2 * 2 * 2 <== or can also be written as 11 * 3 * 2^3