Step-by-step explanation:

3¼ = 13/4

4/5 of 5/6 = 4/5×5/6 = 4/6 = 2/3

4⅓ ÷ 1/5 = 13/3 ÷ 1/5. = 13/3×5/1 = 45/3

3/10 + 21⅕ = 3/10+106/5 = 3+212 / 10 = 215/10

the question can be written as

13/4-2/3. 39-8/12. 31/12

------------ ---- = --------------------- = ------------.

45/3-215/10. 450-645/30. -195/30

= 31/12 × 30/-195 = 930/−2340

hope this is the answer

Answer:

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