To solve this, I first converted 2 5/8 into an improper fraction (2 × 8 = 16, 16 + 5 = 21) and got 21/8.
Next, you need to find the number that, when divided by 8, equals 6, and you can do this simply by multiplying 8 and 6 together to get 48.
We only have 21, so we next do 48 - 21 = 27.
Now we know that our answer is 27/8, but if you would like it as a mixed number then you just do 27 ÷ 8 = 3 (remainder 3), so as a mixed number your answer is 3 3/8.
I hope this helps!
