tolong bantu sama caranya 21 - 33 makasih

21. C. 8 2/5 ÷ 5 = 42/5 x 1/5 = 42/25= 1 17/25

22. A. 4 1/2 ÷ 2 1/4 ÷ 1 3/4= 9/2 ÷9/4÷ 7/4= (9/2 × 4/9) ÷ 7/4= 2÷ 7/4= 2 x 4/7= 8/7= 1 1/7
23. A. 62,5÷0,25×4,3= 107,5