-1/3 + 7/8 = 13/24 13/24 = 0.541667 -1/3 - 7/8 = -29/24 -29/24 = -1.20833 -1/3 * 7/8 = -7/24 -7/24 = -0.291667 -1/3 / 7/8 = -8/21 -8/21 = -0.380952