1/17-17/20
Let's calculate: 117 -1720
20 -17×1717×20
ℹ-17×17 = -289‖17×20 = 340
20 -289340
ℹ20 -289 = -269
▶Result:   -269340
The numeric value of: -269340 is:
▷ ≈ -0.7912