In order to solve whether 26 2/8 equals 210/8 you need to how many 8ths are in 26 2/8. You do this by multiplying the 8 x 26 and then add the 2 from the top of the fraction. (8 x 26) + 2 = 210/8. So yes, 26 2/8 does equal 210/8.
You do the same calculation for 80 3/4. First, you need to multiply 4 times 80, and then add the 3 from the denominator. (80 x 4) + 3 = 323. Yes, 80 3/4 does equal 323/4.