-5 2/3 : 4 1/4 - 5 1/3 : 7/8

Interpret ":" as division. Compute:

• -5 2/3 ÷ 4 1/4

  • -5 2/3 = -17/3; 4 1/4 = 17/4
  • (-17/3) ÷ (17/4) = (-17/3) × (4/17) = -4/3

• 5 1/3 ÷ 7/8

  • 5 1/3 = 16/3
  • (16/3) ÷ (7/8) = (16/3) × (8/7) = 128/21

Now subtract: (-4/3) - (128/21) = (-28/21) - (128/21) = -156/21 = -52/7

Final answer: -52/7 (which is -7 3/7)