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22.( Jawabannya d. 3 39/55)

1 2/5 : 2 3/4 + 3 1/5
= 7/5 : 11/4 + 16/5
= (7/5 × 4/11) + 16/5
= 28/55 + 16/5
= 204/55
= 3 39/55

23. (jawabannya a. 0,89)

17/19
= 17/19 = ..../100
= 100 : 19× 17
= 89 -> 89/100
= 0,89

24. ( Jawabannya C. 85 5/7)

= 6/7
= 6/7 = .../100
= 100 : 7 × 6
= 85,71

25

= 2 1/3 : 3/4 × 1 3/5
= 7/3 : 3/4 × 8/5
= (7/3 × 4/3) × 8/5
= 28/9 × 8/5
= 124/45
= 2 34/45