8/15-6/11
Let's calculate: 815 -611
8×11 -6×1515×11
ℹ8×11 = 88‖-6×15 = -90‖15×11 = 165
88 -90165
ℹ88 -90 = -2
▶Result:   -2165
The numeric value of: -2165 equals:
▷ ≈ -1.2121×10-2