Tolong bantu dong soal perbandingan kelas 7 smp buat besk :( 1. 21/49 = 36/... =.../63 2.75/90= .../72 = 65/... 3.12/52 = 36/... = .../169 4. 121/132 = 176/...=

[tex]1. \: \frac{21}{49} = \frac{36}{...} = \frac{...}{63} \\ \\ \frac{3}{7} = \frac{36}{...} = \frac{...}{63} \\ \\ \frac{3}{7} = \frac{3 \times 12}{7 \times 12} = \frac{9 \times 3}{9 \times 7} \\ \\ \frac{21}{49} = \frac{36}{84} = \frac{27}{63} [/tex]
[tex]2. \: \frac{75}{90} = \frac{75 \div 15}{90 \div 15} = \frac{5}{6} \\ \\ \frac{5}{6} = \frac{...}{72} = \frac{65}{...} \\ \\ \frac{5}{6} = \frac{5 \times 12}{6 \times 12} = \frac{5 \times 13}{6 \times 13} \\ \\ \frac{75}{90} = \frac{60}{72} = \frac{65}{78} [/tex]
[tex]3. \: \frac{12}{52} = \frac{ 36}{...} = \frac{...}{169} \\ \\ \frac{3}{13} = \frac{3 \times 12}{13 \times 12} = \frac{3 \times 13}{13 \times 13} \\ \\ \frac{12}{52} = \frac{36}{156} = \frac{39}{169} [/tex]
[tex]4. \: \frac{121}{132} = \frac{176}{...} = \frac{...}{144} \\ \\ \frac{11}{12} = \frac{11 \times 16}{12 \times 16} = \frac{12 \times 11}{12 \times 12} \\ \\ \frac{121}{132} = \frac{176}{192} = \frac{132}{144} [/tex]
[tex] \frac{80}{85} = \frac{144}{...} = \frac{...}{187} \\ \\ \frac{16}{17} = \frac{16 \times 9}{17 \times 9} = \frac{16 \times 11}{17 \times 11} \\ \\ \frac{80}{85} = \frac{144}{153} = \frac{176}{187} [/tex]