tolong di bantu...nomer 9 dan nomer 10

9) a) 2,75 / 3,3 = 0,833...
    b) 3/5 : 0,25 = 2,4 = 2 2/5 ====> (B)
    c) 2,5 / 0,4 = 6,25
    d) 2 1/4 : 1/8 = 9

10) Umur Arif = 3/4 x 16
                       = 3 x 4
                       = 12 tahun (C)

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9)
[tex] \frac{3}{5} \: \div \: 0.25 = 2 \frac{2}{5} \\ \frac{3}{5} \: \div \frac{1}{4} \: = 2 \frac{2}{5} \\ \frac{3}{5} \times \frac{4}{1} = 2 \frac{2}{5} \\ \frac{12}{5} = 2 \frac{2}{5} [/tex]
10) BAYU : ARIF
4 : 3 = 7

BAYU
[tex] \frac{4}{7} \times x = 16 \\ 4x = 7\times 16 \\ 4x = 112 \\ x = 112 \div 4 \\ x = 28[/tex]
ARIF
[tex] \frac{3}{7} \times 28 = 12[/tex]
umur arif = 12 thn