1/6 is greater than 1/8, because when you change the fractions 1/6 will be 4/24 but 1/8 will be 3/24. To change the fractions you first have to find the lowest number that both denominators can go in, so it is 24. 6 can go into 24 four times, so you multiply the numerator by 4 making 1/6 4/24. 8 can go into 24 three times, so you multiply the numerator by 3 so 1/8 = 3/24.
Because 1/6 is closer to a whole and if you cut a pie into 8 slices and get 1 slice of the 8 it is smaller than 6 pieces cut and get 1 of the 6 and the pieces will be bigger
