Let's calculate: 13 -1118 ⓘTo add fractions, put them over the same denominator, then add the numerators 1×6 -1118 ℹ1×6 = 6 6 -1118 ⓘThe numerator and the denominator are computed before the division: 6 -11 = -5 ▶Result: -518 The numeric value of: -518 equals: ▷ ≈ -0.2778